Remove APIs deprecated for removal in 6.2

This commit removes the following obsolete and deprecated APIs.

- org.springframework.util.Base64Utils

- org.springframework.cache.jcache.interceptor.JCacheOperationSourcePointcut

- org.springframework.http.client.AbstractClientHttpResponse

- org.springframework.http.client.ClientHttpResponse.getRawStatusCode()

- org.springframework.http.client.observation.ClientHttpObservationDocumentation.HighCardinalityKeyNames.CLIENT_NAME

- org.springframework.web.reactive.function.client.ClientHttpObservationDocumentation.HighCardinalityKeyNames.CLIENT_NAME

- org.springframework.web.filter.reactive.ServerWebExchangeContextFilter.get(Context)

- org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleBindException(...)

- org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver.handleBindException(...)

Closes gh-30608

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ResponseEntityExceptionHandler.java

@@ -200,9 +200,6 @@ public abstract class ResponseEntityExceptionHandler implements MessageSourceAwa
 		else if (ex instanceof MethodValidationException subEx) {
 			return handleMethodValidationException(subEx, headers, HttpStatus.INTERNAL_SERVER_ERROR, request);
 		}
-		else if (ex instanceof BindException theEx) {
-			return handleBindException(theEx, headers, HttpStatus.BAD_REQUEST, request);
-		}
 		else {
 			// Unknown exception, typically a wrapper with a common MVC exception as cause
 			// (since @ExceptionHandler type declarations also match nested causes):
@@ -549,30 +546,6 @@ public abstract class ResponseEntityExceptionHandler implements MessageSourceAwa
 		return handleExceptionInternal(ex, body, headers, status, request);
 	}
 
-	/**
-	 * Customize the handling of {@link BindException}.
-	 * <p>By default this method creates a {@link ProblemDetail} with the status
-	 * and a short detail message, and then delegates to
-	 * {@link #handleExceptionInternal}.
-	 * @param ex the exception to handle
-	 * @param headers the headers to use for the response
-	 * @param status the status code to use for the response
-	 * @param request the current request
-	 * @return a {@code ResponseEntity} for the response to use, possibly
-	 * {@code null} when the response is already committed
-	 * @deprecated as of 6.0 since {@link org.springframework.web.method.annotation.ModelAttributeMethodProcessor}
-	 * now raises the {@link MethodArgumentNotValidException} subclass instead.
-	 */
-	@Nullable
-	@Deprecated(since = "6.0", forRemoval = true)
-	protected ResponseEntity<Object> handleBindException(
-			BindException ex, HttpHeaders headers, HttpStatusCode status, WebRequest request) {
-
-		ProblemDetail body = ProblemDetail.forStatusAndDetail(status, "Failed to bind request");
-		return handleExceptionInternal(ex, body, headers, status, request);
-	}
-
-
 	/**
 	 * Customize the handling of {@link MethodValidationException}.
 	 * <p>By default this method creates a {@link ProblemDetail} with the status

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/support/DefaultHandlerExceptionResolver.java

@@ -31,8 +31,6 @@ import org.springframework.http.ProblemDetail;
 import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.http.converter.HttpMessageNotWritableException;
 import org.springframework.lang.Nullable;
-import org.springframework.validation.BindException;
-import org.springframework.validation.BindingResult;
 import org.springframework.validation.method.MethodValidationException;
 import org.springframework.web.ErrorResponse;
 import org.springframework.web.HttpMediaTypeNotAcceptableException;
@@ -42,7 +40,6 @@ import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.MissingPathVariableException;
 import org.springframework.web.bind.MissingServletRequestParameterException;
 import org.springframework.web.bind.ServletRequestBindingException;
-import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestPart;
 import org.springframework.web.context.request.async.AsyncRequestTimeoutException;
@@ -240,9 +237,6 @@ public class DefaultHandlerExceptionResolver extends AbstractHandlerExceptionRes
 			else if (ex instanceof MethodValidationException theEx) {
 				return handleMethodValidationException(theEx, request, response, handler);
 			}
-			else if (ex instanceof BindException theEx) {
-				return handleBindException(theEx, request, response, handler);
-			}
 		}
 		catch (Exception handlerEx) {
 			if (logger.isWarnEnabled()) {
@@ -640,27 +634,6 @@ public class DefaultHandlerExceptionResolver extends AbstractHandlerExceptionRes
 		return new ModelAndView();
 	}
 
-	/**
-	 * Handle the case where an {@linkplain ModelAttribute @ModelAttribute} method
-	 * argument has binding or validation errors and is not followed by another
-	 * method argument of type {@link BindingResult}.
-	 * <p>By default, an HTTP 400 error is sent back to the client.
-	 * @param request current HTTP request
-	 * @param response current HTTP response
-	 * @param handler the executed handler
-	 * @return an empty {@code ModelAndView} indicating the exception was handled
-	 * @throws IOException potentially thrown from {@link HttpServletResponse#sendError}
-	 * @deprecated as of 6.0 since {@link org.springframework.web.method.annotation.ModelAttributeMethodProcessor}
-	 * now raises the {@link MethodArgumentNotValidException} subclass instead.
-	 */
-	@Deprecated(since = "6.0", forRemoval = true)
-	protected ModelAndView handleBindException(BindException ex, HttpServletRequest request,
-			HttpServletResponse response, @Nullable Object handler) throws IOException {
-
-		response.sendError(HttpServletResponse.SC_BAD_REQUEST);
-		return new ModelAndView();
-	}
-
 	/**
 	 * Invoked to send a server error. Sets the status to 500 and also sets the
 	 * request attribute "jakarta.servlet.error.exception" to the Exception.

spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ResponseEntityExceptionHandlerTests.java

@@ -41,7 +41,6 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.http.converter.HttpMessageNotWritableException;
 import org.springframework.stereotype.Controller;
-import org.springframework.validation.BindException;
 import org.springframework.validation.MapBindingResult;
 import org.springframework.validation.method.MethodValidationException;
 import org.springframework.validation.method.MethodValidationResult;
@@ -292,11 +291,6 @@ class ResponseEntityExceptionHandlerTests {
 		testException(new MissingServletRequestPartException("partName"));
 	}
 
-	@Test
-	void bindException() {
-		testException(new BindException(new Object(), "name"));
-	}
-
 	@Test
 	void noHandlerFoundException() {
 		HttpHeaders requestHeaders = new HttpHeaders();

spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/support/DefaultHandlerExceptionResolverTests.java

@@ -36,7 +36,6 @@ import org.springframework.http.converter.HttpMessageNotWritableException;
 import org.springframework.http.server.ServletServerHttpRequest;
 import org.springframework.lang.Nullable;
 import org.springframework.validation.BeanPropertyBindingResult;
-import org.springframework.validation.BindException;
 import org.springframework.web.HttpMediaTypeNotSupportedException;
 import org.springframework.web.HttpRequestMethodNotSupportedException;
 import org.springframework.web.bind.MethodArgumentNotValidException;
@@ -196,15 +195,6 @@ class DefaultHandlerExceptionResolverTests {
 		assertThat(response.getErrorMessage()).contains("not present");
 	}
 
-	@Test
-	void handleBindException() {
-		BindException ex = new BindException(new Object(), "name");
-		ModelAndView mav = exceptionResolver.resolveException(request, response, null, ex);
-		assertThat(mav).as("No ModelAndView returned").isNotNull();
-		assertThat(mav.isEmpty()).as("No Empty ModelAndView returned").isTrue();
-		assertThat(response.getStatus()).as("Invalid status code").isEqualTo(400);
-	}
-
 	@Test
 	void handleNoHandlerFoundException() {
 		ServletServerHttpRequest req = new ServletServerHttpRequest(