slim down tmux, sign commits by default

.gitconfig

@@ -1,6 +1,7 @@
 [user]
     name = Jacob Bohanon
 	email = jacob.bohanon@solo.io
+	signingkey = /home/jacob/.ssh/id_ed25519.pub
 [url "ssh://git@github.com/"]
     insteadOf = https://github.com/
 [tag]
@@ -11,3 +12,7 @@
 	rebase = false
 [color]
 	ui = auto
+[gpg]
+	format = ssh
+[commit]
+	gpgsign = true

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "tmux/plugins/tpm"]
-	path = tmux/plugins/tpm
-	url = https://github.com/tmux-plugins/tpm