LibWeb: Move input size attr width from css to create_layout_node

Author: https://github.com/bplaat
Commit: 7e76358a99
Pull-request: https://github.com/SerenityOS/serenity/pull/23506
Issue: https://github.com/SerenityOS/serenity/issues/23215
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Libraries/LibWeb/CSS/Default.css

@@ -29,7 +29,6 @@ label {
 input:not([type=submit], input[type=button], input[type=image], input[type=reset], input[type=color], input[type=checkbox], input[type=file], input[type=radio], input[type=range]), textarea {
     border: 1px solid ButtonBorder;
     min-height: 16px;
-    width: attr(size ch, 20ch);
     cursor: text;
     overflow: hidden;
 }