Remove unnecessary style

Author: joshenlim

studio/styles/main.scss

@@ -111,15 +111,6 @@ input.form-control,
   filter: invert(0.8);
 }
 
-select {
-  // [Joshen] Color is hard-coded - I can't figure out how to use the UI library colors
-  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' width='16' height='16' fill='transparent' stroke='gray' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='4 11 9 16 14 11'></polyline></svg>");
-}
-
-select option {
-  @apply text-bg-primary-dark;
-}
-
 input.is-invalid {
   @apply bg-red-100;
   @apply border border-red-700;