Commment out use-agent post system upgrade.

Seems like this is no longer a needed argument as of gpg-agent 2+?
https://stackoverflow.com/questions/47273922/purpose-of-gpg-agent-in-gpg2

Weird.

.gnupg/gpg-agent.conf

@@ -3,4 +3,4 @@ max-cache-ttl 31536000
 log-file /var/log/gpg-agent
 debug-level basic
 pinentry-program /run/current-system/sw/bin/pinentry
-use-agent
+#use-agent # commented this out. I did a system upgrade and this argument became inactive.