remove explicit line-height

It was causing text in dropdowns to be slightly truncated
(eg "Tag Only")

ts/deckoptions/deckoptions-base.scss

@@ -27,7 +27,6 @@ $tooltip-max-width: 300px;
 
 .form-control,
 .form-select {
-    line-height: 1;
     // the unprefixed version wasn't added until Chrome 81
     -webkit-appearance: none;
 }