remove delta and add github auth helper

dot_config/git/config

@@ -1,7 +1,6 @@
 [core]
   autocrlf = input
   safecrlf = warn
-  pager = delta
 [user]
   email = joel@beckmeyer.us
   name = Joel Beckmeyer
@@ -25,7 +24,5 @@
   required = true
 [pull]
   rebase = false
-[interactive]
-  diffFilter = delta --color-only
-[delta]
-  navigate = true  # use n and N to move between diff sections
+[credential "https://github.com"]
+	helper = !/usr/bin/gh auth git-credential