Removed dead bootstrap change.

 - Legacy-Id: 9718

Author: levkowetz

bootstrap/less/buttons.less

@@ -67,9 +67,6 @@
 .btn-success {
   .button-variant(@btn-success-color; @btn-success-bg; @btn-success-border);
 }
-.btn-pass {
-  .button-variant(@btn-pass-color; @btn-pass-bg; @btn-pass-border);
-}
 // Info appears as blue-green
 .btn-info {
   .button-variant(@btn-info-color; @btn-info-bg; @btn-info-border);