[IMP] account, web_editor, base: remove useless use strict

According to the ECMAScript 2023 Language Specification:
> Module code is always strict mode code.

Odoo Modules mimic this behavior and automatically add “use strict“ at
the top of the file, so there's no need to do it yourself.

This commit removes all the useless occurrences of use strict.

closes odoo/odoo#132235

Related: odoo/enterprise#45908
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

addons/account/static/tests/account_move_form_tests.js

@@ -1,5 +1,4 @@
 /** @odoo-module **/
-"use strict";
 
 import { start, startServer } from "@mail/../tests/helpers/test_utils";
 import { patchWithCleanup } from "@web/../tests/helpers/utils";

addons/account/static/tests/tours/tax_group_tests.js

@@ -1,5 +1,4 @@
 /** @odoo-module */
-"use strict";
 
 import { registry } from "@web/core/registry";
 import { stepUtils } from "@web_tour/tour_service/tour_utils";

addons/web_editor/static/src/js/backend/convert_inline.js

@@ -1,5 +1,4 @@
 /** @odoo-module */
-'use strict';
 
 import { getAdjacentPreviousSiblings, isBlock, rgbToHex, commonParentGet } from '../editor/odoo-editor/src/utils/utils';
 

addons/web_editor/static/src/js/common/grid_layout_utils.js

@@ -1,5 +1,4 @@
 /** @odoo-module **/
-'use strict';
 
 import { renderToElement } from "@web/core/utils/render";
 import {descendants, preserveCursor} from "@web_editor/js/editor/odoo-editor/src/utils/utils";

addons/web_editor/static/src/js/editor/odoo-editor/src/OdooEditor.js

@@ -1,5 +1,4 @@
 /** @odoo-module **/
-'use strict';
 
 import './commands/deleteBackward.js';
 import './commands/deleteForward.js';

odoo/addons/base/static/tests/test_ir_model_fields_translation.js

@@ -1,7 +1,5 @@
 /** @odoo-module **/
 
-"use strict";
-
 import { registry } from "@web/core/registry";
 import { stepUtils } from "@web_tour/tour_service/tour_utils";
 function checkLoginColumn(translation) {