Simplify if-statements with instanceof checks

Closes gh-25449

spring-context/src/main/java/org/springframework/cache/annotation/SpringCacheAnnotationParser.java

@@ -223,7 +223,7 @@ public class SpringCacheAnnotationParser implements CacheAnnotationParser, Seria
 
 	@Override
 	public boolean equals(@Nullable Object other) {
-		return (this == other || other instanceof SpringCacheAnnotationParser);
+		return (other instanceof SpringCacheAnnotationParser);
 	}
 
 	@Override