Remove redundant throws declarations from internal APIs

Closes gh-31176

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootContextLoaderTests.java

@@ -135,7 +135,7 @@ class SpringBootContextLoaderTests {
 	}
 
 	@Test
-	void propertySourceOrdering() throws Exception {
+	void propertySourceOrdering() {
 		TestContext context = new ExposedTestContextManager(PropertySourceOrdering.class).getExposedTestContext();
 		ConfigurableEnvironment environment = (ConfigurableEnvironment) context.getApplicationContext()
 				.getEnvironment();

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/MockBeanWithDirtiesContextClassModeBeforeMethodIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,7 +48,7 @@ class MockBeanWithDirtiesContextClassModeBeforeMethodIntegrationTests {
 	private ExampleServiceCaller caller;
 
 	@Test
-	void testMocking() throws Exception {
+	void testMocking() {
 		given(this.exampleService.greeting()).willReturn("Boot");
 		assertThat(this.caller.sayGreeting()).isEqualTo("I say Boot");
 	}

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/SpyBeanOnTestFieldForExistingBeanWithQualifierIntegrationTests.java

@@ -53,7 +53,7 @@ class SpyBeanOnTestFieldForExistingBeanWithQualifierIntegrationTests {
 	private ApplicationContext applicationContext;
 
 	@Test
-	void testMocking() throws Exception {
+	void testMocking() {
 		this.caller.sayGreeting();
 		then(this.service).should().greeting();
 	}

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/SpyBeanWithDirtiesContextClassModeBeforeMethodIntegrationTests.java

@@ -47,7 +47,7 @@ class SpyBeanWithDirtiesContextClassModeBeforeMethodIntegrationTests {
 	private ExampleServiceCaller caller;
 
 	@Test
-	void testSpying() throws Exception {
+	void testSpying() {
 		this.caller.sayGreeting();
 		then(this.exampleService).should().greeting();
 	}

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/SpyBeanWithJdkProxyTests.java

@@ -47,7 +47,7 @@ class SpyBeanWithJdkProxyTests {
 	private ExampleRepository repository;
 
 	@Test
-	void jdkProxyCanBeSpied() throws Exception {
+	void jdkProxyCanBeSpied() {
 		Example example = this.service.find("id");
 		assertThat(example.id).isEqualTo("id");
 		then(this.repository).should().find("id");