Remove unused imports.

This cleans up a couple of classes by removing unused imports.

Original pull request: #3240

Signed-off-by: Tran Ngoc Nhan <ngocnhan.tran1996@gmail.com>
(cherry picked from commit 18f27e7e95)

src/main/java/org/springframework/data/aot/ManagedTypesRegistrationAotContribution.java

@@ -15,7 +15,6 @@
  */
 package org.springframework.data.aot;
 
-import java.lang.reflect.Executable;
 import java.lang.reflect.Method;
 import java.util.Collections;
 import java.util.List;

src/main/java/org/springframework/data/repository/config/CustomRepositoryImplementationDetector.java

@@ -18,7 +18,6 @@ package org.springframework.data.repository.config;
 import java.util.Collection;
 import java.util.Optional;
 import java.util.Set;
-import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
 import org.springframework.beans.factory.config.BeanDefinition;