zsh:glog: Remove --all flag

This annoys me in more cases than I thought. For example when checking
out a commit in the past in detached head mode and I want to see the
past commits before the current one.
Especially because there is no flag that can disable it again.

The flag has to be passed manually to `glog` now.

.config/zsh/autoload/glog

@@ -119,6 +119,6 @@ fi
 
 # Display an ascii graph of the commits in the above format and pipe that into
 # fzf.
-git log --all "$formatshort" --graph "$dateshort" --color=always "$@" \
+git log "$formatshort" --graph "$dateshort" --color=always "$@" \
 | fzf "${fzf_args[@]}"
 return 0