Revert "Use Codex styles for buttons in language overlay"

This reverts commit d29050d080.

Reason for revert: I had mistakenly assumed the @wikimedia/codex
module was loaded on clicking the language button. It appears to
be added on page load.

Given T248718 it's still unclear what our policy on loading
@wikimedia/codex on page load is and given several people are out
I think it would be better to attempt this again next week, possibly
delaying further if needed.

Bug: T353071
Bug: T248718
Change-Id: I09334a1faec06a7400e61013ddda374156bf5d72

extension.json

@@ -172,8 +172,7 @@
 			"dependencies": [
 				"mediawiki.jqueryMsg",
 				"mediawiki.language",
-				"ext.uls.common",
-				"@wikimedia/codex"
+				"ext.uls.common"
 			],
 			"messages": [
 				"ext-uls-compact-link-count",
@@ -210,7 +209,9 @@
 				"ext.uls.mediawiki",
 				"ext.uls.webfonts",
 				"mediawiki.api",
-				"@wikimedia/codex",
+				"mediawiki.ui.radio",
+				"mediawiki.ui.checkbox",
+				"mediawiki.ui.button",
 				"mediawiki.user"
 			]
 		},
@@ -278,7 +279,7 @@
 				"ext.uls.messages",
 				"ext.uls.preferences",
 				"jquery.uls.grid",
-				"@wikimedia/codex"
+				"mediawiki.ui.button"
 			]
 		},
 		"ext.uls.mediawiki": {
@@ -346,7 +347,7 @@
 			"dependencies": [
 				"mediawiki.api",
 				"mediawiki.jqueryMsg",
-				"@wikimedia/codex",
+				"mediawiki.ui.button",
 				"mediawiki.Uri"
 			],
 			"messages": [