Remove references to symbol

Author: NullVoxPopuli

packages/@ember/-internals/meta/lib/meta.ts

@@ -1,5 +1,5 @@
 import type { ComputedProperty } from '@ember/-internals/metal';
-import { symbol, toString } from '@ember/-internals/utils';
+import { toString } from '@ember/-internals/utils';
 import { assert } from '@ember/debug';
 import { isDestroyed } from '@glimmer/destroyable';
 import { DEBUG } from '@glimmer/env';
@@ -58,7 +58,7 @@ if (DEBUG) {
 @module ember
 */
 
-export const UNDEFINED = symbol('undefined');
+export const UNDEFINED = Symbol('undefined');
 
 const enum ListenerKind {
   ADD = 0,

packages/@ember/-internals/metal/lib/property_get.ts

@@ -2,14 +2,14 @@
 @module @ember/object
 */
 import type { _ProxyMixin as ProxyMixin } from '@ember/-internals/runtime';
-import { setProxy, symbol } from '@ember/-internals/utils';
+import { setProxy } from '@ember/-internals/utils';
 import { isEmberArray } from '@ember/array/-internals';
 import { assert } from '@ember/debug';
 import { DEBUG } from '@glimmer/env';
 import { consumeTag, isTracking, tagFor, track } from '@glimmer/validator';
 import { isPath } from './path_cache';
 
-export const PROXY_CONTENT = symbol('PROXY_CONTENT');
+export const PROXY_CONTENT = Symbol('PROXY_CONTENT');
 
 export let getPossibleMandatoryProxyValue: (obj: object, keyName: string) => any;
 

packages/@ember/-internals/metal/lib/tags.ts

@@ -1,4 +1,4 @@
-import { isObject, setupMandatorySetter, symbol, toString } from '@ember/-internals/utils';
+import { isObject, setupMandatorySetter, toString } from '@ember/-internals/utils';
 import { assert } from '@ember/debug';
 import { isDestroyed } from '@glimmer/destroyable';
 import { DEBUG } from '@glimmer/env';
@@ -15,7 +15,7 @@ type CustomTagFnWithMandatorySetter = (
 ) => Tag;
 
 // This is exported for `@tracked`, but should otherwise be avoided. Use `tagForObject`.
-export const SELF_TAG: string | symbol = symbol('SELF_TAG');
+export const SELF_TAG: string | symbol = Symbol('SELF_TAG');
 
 export function tagForProperty(
   obj: object,

packages/@ember/controller/index.ts

@@ -6,7 +6,6 @@ import type { DecoratorPropertyDescriptor, ElementDescriptor } from '@ember/-int
 import Mixin from '@ember/object/mixin';
 import type { RouteArgs } from '@ember/routing/-internals';
 import { ActionHandler } from '@ember/-internals/runtime';
-import { symbol } from '@ember/-internals/utils';
 import type { Transition } from 'router_js';
 
 export type ControllerQueryParamType = 'boolean' | 'number' | 'array' | 'string';
@@ -15,7 +14,7 @@ export type ControllerQueryParam =
   | Record<string, { type: ControllerQueryParamType }>
   | Record<string, string>;
 
-const MODEL = symbol('MODEL');
+const MODEL = Symbol('MODEL');
 
 /**
 @module @ember/controller

packages/@ember/object/-internals.ts

@@ -3,7 +3,6 @@ export { guidFor } from '@ember/-internals/utils';
 
 import { addListener } from '@ember/-internals/metal';
 import { assert } from '@ember/debug';
-import { symbol } from '@ember/-internals/utils';
 import { DEBUG } from '@glimmer/env';
 import EmberObject from '.';
 
@@ -27,7 +26,7 @@ let FrameworkObject: typeof EmberObject = class FrameworkObject extends EmberObj
 
 if (DEBUG) {
   const INIT_WAS_CALLED = Symbol('INIT_WAS_CALLED');
-  let ASSERT_INIT_WAS_CALLED = symbol('ASSERT_INIT_WAS_CALLED');
+  let ASSERT_INIT_WAS_CALLED = Symbol('ASSERT_INIT_WAS_CALLED');
 
   FrameworkObject = class DebugFrameworkObject extends EmberObject {
     [INIT_WAS_CALLED] = false;