Revert "Cache the result of findMethod"

This reverts commit 4d87c32.

Author: daniellansun

Diff for: src/main/java/groovy/lang/MetaClassImpl.java

@@ -57,7 +57,6 @@
 import org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite;
 import org.codehaus.groovy.runtime.callsite.StaticMetaClassSite;
 import org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite;
-import org.codehaus.groovy.runtime.memoize.LRUCache;
 import org.codehaus.groovy.runtime.metaclass.ClosureMetaMethod;
 import org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl;
 import org.codehaus.groovy.runtime.metaclass.MetaMethodIndex;
@@ -3166,28 +3165,9 @@ private static void filterMatchingMethodForCategory(FastArray list, MetaMethod m
         list.add(method);
     }
 
-    private static final MetaMethod NULL_METAMETHOD = new MetaMethod() {
-        @Override
-        public int getModifiers() { return 0; }
-        @Override
-        public String getName() { return ""; }
-        @Override
-        public Class getReturnType() { return null; }
-        @Override
-        public CachedClass getDeclaringClass() { return null; }
-        @Override
-        public Object invoke(Object object, Object[] arguments) { return null; }
-    };
-    private static final LRUCache<Method, MetaMethod> METHOD_CACHE = new LRUCache<>(512);
     private MetaMethod findMethod(Method method) {
-        MetaMethod result = METHOD_CACHE.getAndPut(method, m -> {
-            CachedMethod cachedMethod = CachedMethod.find(m);
-            MetaMethod metaMethod = cachedMethod == null ? null : findMethod(cachedMethod);
-            if (metaMethod == null) metaMethod = NULL_METAMETHOD;
-            return metaMethod;
-        });
-        if (result == NULL_METAMETHOD) result = null;
-        return result;
+        CachedMethod cachedMethod = CachedMethod.find(method);
+        return cachedMethod == null ? null : findMethod(cachedMethod);
     }
 
     /**