Fix for table cell alignment

Remove extraneous CSS rule

themes/tiddlywiki/snowwhite/base.tid

@@ -83,7 +83,6 @@ table {
 }
 
 table th, table td {
-	text-align: left;
 	padding: 0 0.5em 0 0.5em;
 	border-top: 1px solid #ddd;
 	border-left: 1px solid #ddd;