Revert of [es6] support AssignmentPattern as LHS in for-in/of loops

test/mjsunit/harmony/destructuring-assignment.js

Index: test/mjsunit/harmony/destructuring-assignment.js
diff --git a/test/mjsunit/harmony/destructuring-assignment.js b/test/mjsunit/harmony/destructuring-assignment.js
index bc8c424d8b48f4085e2e9c88a9ef03a837221d1f..d5ba9eef7cd1b6d48efe56108f7df962cd6a9ac4 100644
--- a/test/mjsunit/harmony/destructuring-assignment.js
+++ b/test/mjsunit/harmony/destructuring-assignment.js
@@ -428,55 +428,3 @@
   assertThrows(() => { ({ a: [ c ] } = { a: [ "nope!" ] }); }, TypeError);
   assertEquals("untouchable", c);
 })();
-
-(function testForIn() {
-  var log = [];
-  var x = {};
-  var object = {
-    "Apenguin": 1,
-    "\u{1F382}cake": 2,
-    "Bpuppy": 3,
-    "Cspork": 4
-  };
-  for ([x.firstLetter, ...x.rest] in object) {
-    if (x.firstLetter === "A") {
-      assertEquals(["p", "e", "n", "g", "u", "i", "n"], x.rest);
-      continue;
-    }
-    if (x.firstLetter === "C") {
-      assertEquals(["s", "p", "o", "r", "k"], x.rest);
-      break;
-    }
-    log.push({ firstLetter: x.firstLetter, rest: x.rest });
-  }
-  assertEquals([
-    { firstLetter: "\u{1F382}", rest: ["c", "a", "k", "e"] },
-    { firstLetter: "B", rest: ["p", "u", "p", "p", "y"] },
-  ], log);
-})();
-
-(function testForOf() {
-  var log = [];
-  var x = {};
-  var names = [
-    "Apenguin",
-    "\u{1F382}cake",
-    "Bpuppy",
-    "Cspork"
-  ];
-  for ([x.firstLetter, ...x.rest] of names) {
-    if (x.firstLetter === "A") {
-      assertEquals(["p", "e", "n", "g", "u", "i", "n"], x.rest);
-      continue;
-    }
-    if (x.firstLetter === "C") {
-      assertEquals(["s", "p", "o", "r", "k"], x.rest);
-      break;
-    }
-    log.push({ firstLetter: x.firstLetter, rest: x.rest });
-  }
-  assertEquals([
-    { firstLetter: "\u{1F382}", rest: ["c", "a", "k", "e"] },
-    { firstLetter: "B", rest: ["p", "u", "p", "p", "y"] },
-  ], log);
-})();