Remove Test Environment Notice component and related messages from AdminPane.

lang/en-US.json

@@ -418,8 +418,6 @@
   "Admin.manageTasks.controls.showReviewColumns.label": "Show Review Columns",
   "Admin.testEnvironmentBanner.localTitle": "You are in a MapRoulette Local environment.",
   "Admin.testEnvironmentBanner.stagingTitle": "You are in a MapRoulette Staging environment.",
-  "Admin.testEnvironmentNotice.description": "Consider using the [MapRoulette Staging Website](https://staging.maproulette.org), a clone of MapRoulette often used for development, where you can create test challenges, projects, and similar tasks.",
-  "Admin.testEnvironmentNotice.title": "Testing Something?",
   "AutosuggestTextBox.labels.noResults": "No matches",
   "BoundsSelectorModal.control.dismiss.label": "Select Bounds",
   "BoundsSelectorModal.primaryMessage": "Highlight bounds you would like to select.",

src/components/AdminPane/AdminPane.jsx

@@ -21,7 +21,6 @@ import ProjectsDashboard from "./Manage/ProjectsDashboard/ProjectsDashboard";
 import ManageChallengeList from "./Manage/VirtualProjects/ManageChallengeList";
 import "./Manage/Widgets/widget_registry.js";
 import "./AdminPane.scss";
-import TestEnvironmentNotice from "./Manage/TestEnvironmentNotice/TestEnvironmentNotice";
 
 /**
  * AdminPane is the top-level component for administration functions. It has a
@@ -56,7 +55,6 @@ export class AdminPane extends Component {
 
     return (
       <Fragment>
-        <TestEnvironmentNotice />
         <EmailRequirementNotice />
         <div className="admin mr-bg-gradient-r-green-dark-blue mr-text-white">
           <div className="admin-pane">