Remove obsolete `background-size` vendor prefix

Removing outdated `-o-` vendor prefix for some esoteric versions of
Opera, for example on Nintendo DS and adding "Deprecated" notice.
Also changing "Less" to new diction - no uppercase any more.

Bug: T121473
Change-Id: I0be3b94979f718dc6fbfac785e951a2cb9564eb4

diff --git a/resources/src/mediawiki.less/mediawiki.mixins.less b/resources/src/mediawiki.less/mediawiki.mixins.less
index 690be56..06c18e6 100644 (file)
--- a/resources/src/mediawiki.less/mediawiki.mixins.less
+++ b/resources/src/mediawiki.less/mediawiki.mixins.less
@@ -1,4 +1,4 @@
-// Common LESS mixin library for MediaWiki
+// Common Less mixin library for MediaWiki
 //
 // By default the folder containing this file is included in $wgResourceLoaderLESSImportPaths,
 // which makes this file importable by all less files via '@import "mediawiki.mixins";'.
@@ -12,9 +12,8 @@
        background-image: e('/* @embed */') url(@url);
 }
 
+// Deprecated in MW 1.27
 .background-size(@width, @height) {
-       // Vendor prefix for certain older opera browsers e.g. nintendo ds
-       -o-background-size: @width @height;
        // Vendor prefix is added to support Android 2
        -webkit-background-size: @width @height;
        background-size: @width @height;