Add border breakpoint

resources/assets/sass/custom.scss

@@ -173,3 +173,9 @@ body, button, input, textarea {
     background-size: cover;
     background-position: 50%;
 }
+
+@media (max-width: map-get($grid-breakpoints, "md")) {
+ .border-md-left-0 {
+  border-left:0!important
+ }
+}