Clean up warnings in spring-test

spring-test/src/main/java/org/springframework/test/web/client/match/MockRestRequestMatchers.java

@@ -124,7 +124,6 @@ public abstract class MockRestRequestMatchers {
 	 * Assert request header values with the given Hamcrest matcher.
 	 */
 	@SafeVarargs
-	@SuppressWarnings("unchecked")
 	public static RequestMatcher header(final String name, final Matcher<? super String>... matchers) {
 		return new RequestMatcher() {
 			@Override

spring-test/src/test/java/org/springframework/test/web/client/match/MockRestRequestMatchersTests.java

@@ -91,7 +91,6 @@ public class MockRestRequestMatchersTests {
 		MockRestRequestMatchers.header("foo", "bad").match(this.request);
 	}
 
-	@SuppressWarnings("unchecked")
 	@Test
 	public void headerContains() throws Exception {
 		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
@@ -99,13 +98,11 @@ public class MockRestRequestMatchersTests {
 		MockRestRequestMatchers.header("foo", containsString("ba")).match(this.request);
 	}
 
-	@SuppressWarnings("unchecked")
 	@Test(expected = AssertionError.class)
 	public void headerContainsWithMissingHeader() throws Exception {
 		MockRestRequestMatchers.header("foo", containsString("baz")).match(this.request);
 	}
 
-	@SuppressWarnings("unchecked")
 	@Test(expected = AssertionError.class)
 	public void headerContainsWithMissingValue() throws Exception {
 		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));

spring-test/src/test/java/org/springframework/test/web/client/samples/matchers/HeaderRequestMatchersIntegrationTests.java

@@ -71,7 +71,6 @@ public class HeaderRequestMatchersIntegrationTests {
 		this.mockServer.verify();
 	}
 
-	@SuppressWarnings("unchecked")
 	@Test
 	public void testStringContains() throws Exception {