Reduce unnecessary selector specificity

Similar to Iae532d63893489.

Bug: T214218
Change-Id: Ied2ba7fa4ecf148d48b9b327397ff9d57b3752af

resources/screen-common.less

@@ -575,7 +575,7 @@ body :not( :checked ) > .toctogglespan:after {
 .mw-changeslist-legend,
 .mw-body .mw-search-profile-tabs,
 .mw-body fieldset#mw-searchoptions,
-table.wikitable {
+.wikitable {
 	border: 0;
 	color: @text;
 	.box;
@@ -585,16 +585,16 @@ table.wikitable {
 	padding: 0.5em;
 }
 
-table.wikitable > tr > th,
-table.wikitable > tr > td,
-table.wikitable > * > tr > th,
-table.wikitable > * > tr > td {
+.wikitable > tr > th,
+.wikitable > tr > td,
+.wikitable > * > tr > th,
+.wikitable > * > tr > td {
 	border: 1px solid @grey-bright;
 	padding: 0.5em;
 }
 
-table.wikitable > tr > th,
-table.wikitable > * > tr > th {
+.wikitable > tr > th,
+.wikitable > * > tr > th {
 	border: 0;
 }