Remove deprecated GenericPropertiesContextLoader from the TCF

Since GenericPropertiesContextLoader was deprecated in Spring Framework
5.3, we have decided to remove it in Spring Framework 6.0.

Closes gh-28911

spring-test/src/main/java/org/springframework/test/context/support/GenericPropertiesContextLoader.java

@@ -1,74 +0,0 @@
-/*
- * Copyright 2002-2020 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.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.test.context.support;
-
-import java.util.Properties;
-
-import org.springframework.beans.factory.support.BeanDefinitionReader;
-import org.springframework.context.support.GenericApplicationContext;
-import org.springframework.test.context.MergedContextConfiguration;
-import org.springframework.util.ObjectUtils;
-
-/**
- * Concrete implementation of {@link AbstractGenericContextLoader} that reads
- * bean definitions from Java {@link Properties} resources.
- *
- * @author Sam Brannen
- * @since 2.5
- * @deprecated as of 5.3, in favor of Spring's common bean definition formats
- * and/or custom loader implementations
- */
-@Deprecated
-public class GenericPropertiesContextLoader extends AbstractGenericContextLoader {
-
-	/**
-	 * Creates a new {@link org.springframework.beans.factory.support.PropertiesBeanDefinitionReader}.
-	 * @return a new PropertiesBeanDefinitionReader
-	 * @see org.springframework.beans.factory.support.PropertiesBeanDefinitionReader
-	 */
-	@Override
-	protected BeanDefinitionReader createBeanDefinitionReader(final GenericApplicationContext context) {
-		return new org.springframework.beans.factory.support.PropertiesBeanDefinitionReader(context);
-	}
-
-	/**
-	 * Returns "{@code -context.properties}".
-	 */
-	@Override
-	protected String getResourceSuffix() {
-		return "-context.properties";
-	}
-
-	/**
-	 * Ensure that the supplied {@link MergedContextConfiguration} does not
-	 * contain {@link MergedContextConfiguration#getClasses() classes}.
-	 * @since 4.0.4
-	 * @see AbstractGenericContextLoader#validateMergedContextConfiguration
-	 */
-	@Override
-	protected void validateMergedContextConfiguration(MergedContextConfiguration mergedConfig) {
-		if (mergedConfig.hasClasses()) {
-			String msg = String.format(
-				"Test class [%s] has been configured with @ContextConfiguration's 'classes' attribute %s, "
-						+ "but %s does not support annotated classes.", mergedConfig.getTestClass().getName(),
-				ObjectUtils.nullSafeToString(mergedConfig.getClasses()), getClass().getSimpleName());
-			logger.error(msg);
-			throw new IllegalStateException(msg);
-		}
-	}
-
-}