Bug 1790646 Part 2 - Switch to using the new string and remove the old one. r=pip-reviewers,fluent-reviewers,mconley,flod

Differential Revision: https://phabricator.services.mozilla.com/D159290

toolkit/components/pictureinpicture/tests/browser_nimbusMessageFirstTimePip.js

@@ -78,7 +78,7 @@ add_task(async function test_experiment_control() {
       );
 
       let pipExplainerMessage = l10n.formatValueSync(
-        "videocontrols-picture-in-picture-explainer2"
+        "videocontrols-picture-in-picture-explainer3"
       );
 
       await SimpleTest.promiseFocus(browser);

toolkit/components/pictureinpicture/tests/browser_nimbusShowIconOnly.js

@@ -78,7 +78,7 @@ add_task(async function test_experiment_control() {
       );
 
       let pipExplainerMessage = l10n.formatValueSync(
-        "videocontrols-picture-in-picture-explainer2"
+        "videocontrols-picture-in-picture-explainer3"
       );
 
       await SimpleTest.promiseFocus(browser);

toolkit/content/widgets/videocontrols.js

@@ -2868,7 +2868,7 @@ this.VideoControlsImplWidget = class {
                   <span class="pip-icon"></span>
                   <span class="pip-label" data-l10n-id="videocontrols-picture-in-picture-toggle-label2"></span>
                 </span>
-                <div class="pip-explainer clickable" data-l10n-id="videocontrols-picture-in-picture-explainer2"></div>
+                <div class="pip-explainer clickable" data-l10n-id="videocontrols-picture-in-picture-explainer3"></div>
               </div>
               <div class="pip-icon clickable"></div>
             </button>
@@ -3374,7 +3374,7 @@ this.NoControlsDesktopImplWidget = class {
                   <span class="pip-icon"></span>
                   <span class="pip-label" data-l10n-id="videocontrols-picture-in-picture-toggle-label2"></span>
                 </span>
-                <div class="pip-explainer clickable" data-l10n-id="videocontrols-picture-in-picture-explainer2"></div>
+                <div class="pip-explainer clickable" data-l10n-id="videocontrols-picture-in-picture-explainer3"></div>
               </div>
               <div class="pip-icon"></div>
             </button>

toolkit/locales/en-US/toolkit/global/videocontrols.ftl

@@ -41,7 +41,6 @@ videocontrols-picture-in-picture-toggle-label2 = Pop out this video
 # This string is used as part of a variation of the Picture-in-Picture video toggle
 # button. When using this variation, this string appears below the toggle when the
 # mouse hovers the toggle.
-videocontrols-picture-in-picture-explainer2 = More screens are more fun. Play this video in Picture-in-Picture while you browse.
 videocontrols-picture-in-picture-explainer3 = More screens are more fun. Play this video while you do other things.
 
 videocontrols-error-aborted = Video loading stopped.