nix needless disables

Author: shawnbot

src/buttons/button.scss

@@ -17,7 +17,6 @@
   background-repeat: repeat-x;
   background-position: -1px -1px;
   background-size: 110% 110%;
-  // stylelint-disable-next-line primer/borders
   border: $border-width $border-style $border-color-button;
   // stylelint-disable-next-line primer/borders
   border-radius: 0.25em;

src/buttons/misc.scss

@@ -73,8 +73,7 @@
   color: $text-gray-dark;
   vertical-align: middle;
   background-color: $bg-white;
-  // stylelint-disable-next-line primer/borders
-  border: $border-width $border-style $border-color-button; // match with .btn
+  border: $border-width $border-style $border-color-button;
   border-left: 0;
   border-top-right-radius: $border-radius;
   border-bottom-right-radius: $border-radius;