ENGCOM-1853: Removed unused class from forms less file. #15791

 - Merge Pull Request #15791 from chirag-wagento/magento2:lib-forms-less-patch
 - Merged commits:
   1. b646e61

Author: magento-engcom-team

lib/web/css/source/lib/_forms.less

@@ -465,11 +465,9 @@
     .lib-css(margin, @_margin);
     .lib-css(padding, @_padding);
     letter-spacing: -.31em;
-    //word-spacing: -.43em;
 
     > * {
         letter-spacing: normal;
-        //word-spacing: normal;
     }
 
     > .legend {