Remove new target workaround from super call (#4447)

After #4372 and #4369 all builtin constructors have new target support.

This patch fixes #4446.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

tests/jerry/es.next/regression-test-issue-4446.js

@@ -0,0 +1,31 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+class Base {
+  constructor() {
+      return new Proxy(this, {
+          defineProperty(target, p, desc) {
+              return Reflect.defineProperty(target, p, desc);
+          }
+      });
+  }
+}
+
+let computedKey = "test";
+class BasicTPK extends Base {
+  [computedKey] = "basic";
+}
+
+let instance = new BasicTPK;
+assert(instance instanceof BasicTPK);