Removed an empty statement

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/AbstractOAuth2AuthorizationServerMetadata.java

@@ -73,7 +73,7 @@ public abstract class AbstractOAuth2AuthorizationServerMetadata implements OAuth
 		@SuppressWarnings("unchecked")
 		protected final B getThis() {
 			return (B) this;	// avoid unchecked casts in subclasses by using "getThis()" instead of "(B) this"
-		};
+		}
 
 		/**
 		 * Use this {@code issuer} in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, REQUIRED.