Importing common css components in a plugin breaks css priorities in core

Author: angusmcleod

assets/stylesheets/common/admin.scss

@@ -1,7 +1,6 @@
 @import "admin/mapper";
 @import "admin/manager";
 @import "admin/api";
-@import "common/components/buttons";
 @import "admin/variables";
 
 $expired: #339b18;
@@ -687,14 +686,6 @@ $error: #ef1700;
     }
   }
 
-  .btn.save:enabled {
-    @extend .btn-primary;
-  }
-
-  .btn.destroy {
-    @extend .btn-danger;
-  }
-
   h3 {
     margin-bottom: 0;
   }