remove unneeded method in __LE__ frozen set builtin node

Author: cosminbasca

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/set/FrozenSetBuiltins.java

@@ -98,22 +98,14 @@ Object doGeneric(Object self, Object other) {
     abstract static class LeNode extends PythonBinaryBuiltinNode {
         @Child private HashingStorageNodes.ContainsKeyNode containsKeyNode = HashingStorageNodes.ContainsKeyNode.create();
 
-        private HashingStorageNodes.ContainsKeyNode getContainsKeyNode() {
-            if (containsKeyNode == null) {
-                CompilerDirectives.transferToInterpreterAndInvalidate();
-                containsKeyNode = insert(HashingStorageNodes.ContainsKeyNode.create());
-            }
-            return containsKeyNode;
-        }
-
         @Specialization
         Object run(PBaseSet self, PBaseSet other) {
             if (self.size() > other.size()) {
                 return false;
             }
 
             for (Object value : self.values()) {
-                if (!getContainsKeyNode().execute(other.getDictStorage(), value)) {
+                if (!containsKeyNode.execute(other.getDictStorage(), value)) {
                     return false;
                 }
             }