Tidying imports etc

core/src/test/java/org/springframework/security/GrantedAuthorityImplTests.java

@@ -87,10 +87,6 @@ public class GrantedAuthorityImplTests extends TestCase {
 			return this.role.compareTo(((GrantedAuthority)o).getAuthority());
 		}
 
-		private MockGrantedAuthorityImpl() {
-            super();
-        }
-
         public String getAuthority() {
             return this.role;
         }

core/src/test/java/org/springframework/security/config/DataSourcePopulator.java

@@ -17,7 +17,6 @@ package org.springframework.security.config;
 import javax.sql.DataSource;
 
 import org.springframework.beans.factory.InitializingBean;
-import org.springframework.beans.factory.DisposableBean;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.util.Assert;
 

core/src/test/java/org/springframework/security/ui/rememberme/PersistentTokenBasedRememberMeServicesTests.java

@@ -5,7 +5,6 @@ import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.mock.web.MockHttpServletResponse;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNull;
 import org.junit.Before;
 import org.junit.Test;