Remove active radio-group checkmark icon

Fixes #71

Author: georgeolaru

dist/js/customizer.css

@@ -29,25 +29,6 @@
     &:checked + label {
       background-color: var(--sm-color-palette-accent-color-7);
       color: var(--sm-color-palette-neutral-color-1);
-
-      &:before {
-        content: "";
-
-        display: inline-block;
-        color: inherit;
-
-        position: relative;
-        top: .285em;
-        margin-right: .45em;
-
-        height: .8em;
-        width: .55em;
-
-        border-right: 2px solid;
-        border-bottom: 2px solid;
-
-        transform: translateY(-50%) rotate(45deg);
-      }
     }
   }
 

src/_js/customizer/scss/controls/_radio-group.scss

@@ -4,10 +4,16 @@ export const runRadioGroupStyleTests = async ( assert ) => {
   const { readFile } = await import( 'node:fs/promises' );
   const source = await readFile( RADIO_GROUP_SCSS_PATH, 'utf8' );
   const labelBlockMatch = source.match( /label\s*\{([\s\S]*?)&:nth-of-type\(2\)/ );
+  const checkedLabelBlockMatch = source.match( /&:checked\s*\+\s*label\s*\{([\s\S]*?)\n\s*\}\n\s*\}/ );
 
   assert.ok( labelBlockMatch, 'expected to find the shared sm-radio-group label rule' );
+  assert.ok( checkedLabelBlockMatch, 'expected to find the shared checked label rule' );
   assert.ok(
     /transition\s*:\s*all\s+1s\s+ease\s*;/.test( labelBlockMatch[1] ),
     'shared sm-radio-group labels should use the temporary 1s inspection transition'
   );
+  assert.ok(
+    ! /&:before\s*\{/.test( checkedLabelBlockMatch[1] ),
+    'shared sm-radio-group active labels should not render a checkmark pseudo-element'
+  );
 };