Remove unused MapSupplier

Author: yannbriancon

src/main/java/com/yannbriancon/interceptor/HibernateQueryInterceptor.java

@@ -10,9 +10,7 @@
 
 import javax.persistence.EntityManager;
 import java.io.Serializable;
-import java.util.HashMap;
 import java.util.HashSet;
-import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
 import java.util.function.Supplier;
@@ -255,9 +253,3 @@ public Set<String> get() {
         return new HashSet<>();
     }
 }
-
-class EmptyMapSupplier implements Supplier<Map<String, String>> {
-    public Map<String, String> get() {
-        return new HashMap<>();
-    }
-}