Fix tts play logic (#2683)

Co-authored-by: luowei <glpat-EjySCyNjWiLqAED-YmwM>
Co-authored-by: crazywoola <427733928@qq.com>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>

web/app/components/base/audio-btn/style.module.css

@@ -8,9 +8,3 @@
   background-position: center;
   background-repeat: no-repeat;
 }
-
-.stopIcon {
-  background-position: center;
-  background-repeat: no-repeat;
-  background-image: url(~@/app/components/develop/secret-key/assets/stop.svg);
-}