Remove $wgUseMediaWikiUIEverywhere

MediaWiki UI has never really made it out of beta before being
deprecated. Legacy code using plain HTML forms doesn't need it;
new code can be written using Codex.

Bug: T182050
Change-Id: Ib9966bc6a4a94f771cb99a5aa52fb6a1dc826ca5

RELEASE-NOTES-1.42

@@ -62,6 +62,7 @@ For notes on 1.41.x and older releases, see HISTORY.
   Register an extension tag named <img> instead.
 * $wgMinimalPasswordLength and $wgMaximalPasswordLength, deprecated since 1.26
   have been dropped. Use $wgPasswordPolicy instead.
+* $wgUseMediaWikiUIEverywhere has been removed.
 * …
 
 === New user-facing features in 1.42 ===

docs/config-schema.yaml

@@ -3188,13 +3188,6 @@ config-schema:
             This global allows skins or extensions a means to force non-table based rendering.
             Setting to false forces form components to always render as div elements.
             @since 1.24
-    UseMediaWikiUIEverywhere:
-        default: false
-        description: |-
-            Temporary variable that applies MediaWiki UI wherever it can be supported.
-            Temporary variable that should be removed when mediawiki ui is more
-            stable and change has been communicated.
-            @since 1.24
     EditSubmitButtonLabelPublish:
         default: false
         description: |-

docs/config-vars.php

@@ -1940,12 +1940,6 @@ $wgHtml5Version = null;
  */
 $wgHTMLFormAllowTableFormat = null;
 
-/**
- * Config variable stub for the UseMediaWikiUIEverywhere setting, for use by phpdoc and IDEs.
- * @see MediaWiki\MainConfigSchema::UseMediaWikiUIEverywhere
- */
-$wgUseMediaWikiUIEverywhere = null;
-
 /**
  * Config variable stub for the EditSubmitButtonLabelPublish setting, for use by phpdoc and IDEs.
  * @see MediaWiki\MainConfigSchema::EditSubmitButtonLabelPublish

includes/MainConfigNames.php

@@ -1955,12 +1955,6 @@ class MainConfigNames {
 	 */
 	public const HTMLFormAllowTableFormat = 'HTMLFormAllowTableFormat';
 
-	/**
-	 * Name constant for the UseMediaWikiUIEverywhere setting, for use with Config::get()
-	 * @see MainConfigSchema::UseMediaWikiUIEverywhere
-	 */
-	public const UseMediaWikiUIEverywhere = 'UseMediaWikiUIEverywhere';
-
 	/**
 	 * Name constant for the EditSubmitButtonLabelPublish setting, for use with Config::get()
 	 * @see MainConfigSchema::EditSubmitButtonLabelPublish

includes/MainConfigSchema.php

@@ -5134,18 +5134,6 @@ class MainConfigSchema {
 		'default' => true,
 	];
 
-	/**
-	 * Temporary variable that applies MediaWiki UI wherever it can be supported.
-	 *
-	 * Temporary variable that should be removed when mediawiki ui is more
-	 * stable and change has been communicated.
-	 *
-	 * @since 1.24
-	 */
-	public const UseMediaWikiUIEverywhere = [
-		'default' => false,
-	];
-
 	/**
 	 * Whether to label the store-to-database-and-show-to-others button in the editor
 	 * as "Save page"/"Save changes" if false (the default) or, if true, instead as

includes/config-schema.php

@@ -625,7 +625,6 @@ return [
 			'MimeType' => 'text/html',
 			'Html5Version' => null,
 			'HTMLFormAllowTableFormat' => true,
-			'UseMediaWikiUIEverywhere' => false,
 			'EditSubmitButtonLabelPublish' => false,
 			'XhtmlNamespaces' => [
 			],