Ensure GPG keygrips used as SSH keys are correctly read

.gnupg/sshcontrol

@@ -1,2 +1,3 @@
 8870E499C64EEB7720EBA5A442F4FE90129BFAE3
 
+# End of file

.zshrc

@@ -83,13 +83,9 @@ unset SSH_AGENT_PID
 if [ "${gnupg_SSH_AUTH_SOCK_by:-0}" -ne $$ ]; then
   export SSH_AUTH_SOCK="$(gpgconf --list-dirs agent-ssh-socket)"
 fi
-export GPG_TTY=$(tty)
+export GPG_TTY="$(tty)"
 gpg-connect-agent updatestartuptty /bye >/dev/null
 
-export KEYGRIP=8870E499C64EEB7720EBA5A442F4FE90129BFAE3
-# Sometimes gpg has a bug and needs to re-import key
-alias gbye='gpg-connect-agent "delete_key $KEYGRIP" /bye'
-
 if [ -f ~/.aliases ]; then
     . ~/.aliases
 fi