Better handling of formatting in pasted text

stylesheets/components/MessageTextRenderer.scss

@@ -49,22 +49,6 @@
       }
     }
 
-    &--spoiler--copy-target {
-      // We don't want this thing to affect the layout of the message
-      position: absolute;
-      top: 0;
-      // We can use left here; this is not visible to the user
-      /* stylelint-disable liberty/use-logical-spec */
-      left: 0;
-
-      height: 1px;
-      width: 1px;
-
-      // Hide text
-      color: transparent;
-      overflow: hidden;
-    }
-
     // Note: This is referenced in formatting/matchers.ts, to detect these styles on paste
     &--spoiler--noninteractive {
       cursor: inherit;