Remove destructuring and default arguments runtime flags

test/mjsunit/harmony/debug-step-destructuring-assignment.js

-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --expose-debug-as debug --harmony-destructuring-assignment
-// Flags: --harmony-destructuring-bind
-
-var exception = null;
-var Debug = debug.Debug;
-var break_count = 0;
-
-function listener(event, exec_state, event_data, data) {
-  if (event != Debug.DebugEvent.Break) return;
-  try {
-    var source = exec_state.frame(0).sourceLineText();
-    print(source);
-    assertTrue(source.indexOf(`// B${break_count++}`) > 0);
-    if (source.indexOf("assertEquals") > 0) {
-      exec_state.prepareStep(Debug.StepAction.StepNext);
-    } else {
-      exec_state.prepareStep(Debug.StepAction.StepIn);
-    }
-  } catch (e) {
-    exception = e;
-    print(e);
-  }
-};
-
-Debug.setListener(listener);
-
-function f() {
-  var a, b, c, d;
-  debugger;                                       // B0
-  [                                               // B1
-    a,                                            // B2
-    b,                                            // B3
-    c = 3                                         // B4
-  ] = [1, 2];
-  assertEquals({a:1,b:2,c:3}, {a, b, c});         // B5
-
-  [                                               // B6
-    a,                                            // B7
-    [
-      b,                                          // B8
-      c                                           // B9
-    ],
-    d                                             // B10
-  ] = [5, [6, 7], 8];
-  assertEquals({a:5,b:6,c:7,d:8}, {a, b, c, d});  // B11
-
-  [                                               // B12
-    a,                                            // B13
-    b,                                            // B14
-    ...c                                          // B15
-  ] = [1, 2, 3, 4];
-  assertEquals({a:1,b:2,c:[3,4]}, {a, b, c});     // B16
-
-  ({                                              // B17
-    a,                                            // B18
-    b,                                            // B19
-    c = 7                                         // B20
-  } = {a: 5, b: 6});
-  assertEquals({a:5,b:6,c:7}, {a, b, c});         // B21
-
-  ({                                              // B22
-    a,                                            // B23
-    b = return1(),                                // B24
-    c = return1()                                 // B25
-  } = {a: 5, b: 6});
-  assertEquals({a:5,b:6,c:1}, {a, b, c});         // B28
-
-  ({                                              // B29
-    x : a,                                        // B30
-    y : b,                                        // B31
-    z : c = 3                                     // B32
-  } = {x: 1, y: 2});
-  assertEquals({a:1,b:2,c:3}, {a, b, c});         // B33
-}                                                 // B34
-
-function return1() {
-  return 1;                                       // B26
-}                                                 // B27
-
-f();
-Debug.setListener(null);                          // B35
-assertNull(exception);