[DDW-604] Deletes unused code in buttons mixin
[DDW-604] Deletes unused code in buttons mixin

input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus