chore: remove .opacity() mixin as it is supported cross-browser

install/package.json

@@ -93,9 +93,9 @@
         "nodebb-plugin-spam-be-gone": "0.7.10",
         "nodebb-rewards-essentials": "0.2.0",
         "nodebb-theme-lavender": "5.2.1",
-        "nodebb-theme-persona": "11.2.19",
+        "nodebb-theme-persona": "11.2.20",
         "nodebb-theme-slick": "1.4.14",
-        "nodebb-theme-vanilla": "12.1.7",
+        "nodebb-theme-vanilla": "12.1.8",
         "nodebb-widget-essentials": "5.0.4",
         "nodemailer": "^6.5.0",
         "nprogress": "0.2.0",

public/less/generics.less

@@ -39,7 +39,7 @@
 
 		&.disabled {
 			background-color: #888!important;
-			.opacity(0.5);
+			opacity: 0.5;
 		}
 	}
 }

public/less/mixins.less

@@ -32,13 +32,6 @@
 	}
 }
 
-.opacity(@opacity: 1) {
-	-moz-opacity: @opacity;
-	opacity: @opacity;
-	-ms-filter: ~`"progid:DXImageTransform.Microsoft.Alpha(opacity=(" + "@{opacity}" * 100 + "))"`;
-	filter: ~`"alpha(opacity = (" + "@{opacity}" * 100 + "))"`;
-}
-
 .border-radius (@radius: 5px) {
 	-webkit-border-radius: @radius;
 	-moz-border-radius: @radius;

src/meta/minifier.js

@@ -228,7 +228,7 @@ Minifier.js.minifyBatch = async function (scripts, fork) {
 actions.buildCSS = async function buildCSS(data) {
 	const lessOutput = await less.render(data.source, {
 		paths: data.paths,
-		javascriptEnabled: true,
+		javascriptEnabled: false,
 	});
 
 	const postcssArgs = [autoprefixer];