Clean up unneeded override

app/webpacker/css/admin_v3/all.scss

@@ -122,8 +122,6 @@
 @import "../shared/question-mark-icon";
 @import "../admin/question-mark-tooltip";
 
-@import "v3_overrides"; // admin_v3
-
 @import "~tom-select/src/scss/tom-select.default";
 @import "components/tom_select"; // admin_v3
 

app/webpacker/css/admin_v3/shared/forms.scss

@@ -33,7 +33,6 @@ textarea {
 
 label {
   font-weight: 600;
-  text-transform: uppercase;
   font-size: 85%;
   margin-bottom: 3px;
   color: $near-black;
@@ -145,7 +144,6 @@ fieldset {
     color: $color-2;
     font-size: 14px;
     font-weight: 600;
-    text-transform: uppercase;
     text-align: center;
     padding: 8px 15px;
     margin: 0 auto;

app/webpacker/css/admin_v3/v3_overrides.scss

@@ -1,11 +0,0 @@
-// Temporary location for some overrides, to avoid having to branch a whole file
-
-// Prevent uppercase
-fieldset legend,
-label,
-input[type=submit],
-input[type=button],
-button,
-.button {
-  text-transform: inherit !important;
-}