chore: remove dead CSS rules (#39188)

web_src/css/features/captcha.css

@@ -24,7 +24,6 @@
 }
 
 @media (max-height: 575px) {
-  #rc-imageselect, /* google recaptcha */
   .g-recaptcha-style,
   .h-captcha-style {
     transform: scale(0.77);

web_src/css/features/expander.css

@@ -90,7 +90,3 @@ text-expander .suggestions img,
   padding: 0;
   list-style: none;
 }
-
-.tribute-container li.no-match {
-  cursor: default;
-}