# Since 1.32 MW introduced interface-admin group to separate all UI-related rights. This makes sense for bigger sites,
# but for OSM it makes more sense to keep group structure simple. Give all interface-admin rights to sysops.
-$wgGroupPermissions['sysop'] = array_merge($wgGroupPermissions['sysop'], $wgGroupPermissions['interface-admin']);
+# Also remove the interface-admin group to avoid confusion.
+$wgGroupPermissions['sysop'] = array_merge( $wgGroupPermissions['sysop'], $wgGroupPermissions['interface-admin'] );
+unset( $wgGroupPermissions['interface-admin'] );
+unset( $wgRevokePermissions['interface-admin'] );
+unset( $wgAddGroups['interface-admin'] );
+unset( $wgRemoveGroups['interface-admin'] );
+unset( $wgGroupsAddToSelf['interface-admin'] );
+unset( $wgGroupsRemoveFromSelf['interface-admin'] );
# Restrict access to the upload directory
$wgUploadPath = "$wgScriptPath/img_auth.php";