Fix stylelint warnings for toggle.scss

app/assets/stylesheets/framework/toggle.scss

@@ -63,14 +63,6 @@
     .toggle-icon-svg {
       fill: $gl-gray-400;
     }
-
-    .toggle-status-checked {
-      display: none;
-    }
-
-    .toggle-status-unchecked {
-      display: inline;
-    }
   }
 
   .loading-icon {
@@ -84,10 +76,6 @@
   }
 
   &.is-loading {
-    .toggle-icon {
-      display: none;
-    }
-
     .loading-icon {
       display: block;
 
@@ -109,15 +97,18 @@
       .toggle-icon-svg {
         fill: $feature-toggle-color-enabled;
       }
+    }
+  }
 
-      .toggle-status-checked {
-        display: inline;
-      }
+  &.is-checked .toggle-icon .toggle-status-checked,
+  .toggle-icon .toggle-status-unchecked {
+    display: inline;
+  }
 
-      .toggle-status-unchecked {
-        display: none;
-      }
-    }
+  &.is-checked .toggle-icon .toggle-status-unchecked,
+  &.is-loading .toggle-icon,
+  .toggle-icon .toggle-status-checked {
+    display: none;
   }
 
   &.is-disabled {