Removing gdb alias as it conflicts with an actual command for gdb. Closes #17

lib/aliases.zsh

@@ -37,7 +37,6 @@ alias gc='git commit -v'
 alias gca='git commit -v -a'
 alias gb='git branch'
 alias gba='git branch -a'
-alias gdb='git branch -d'
 alias gcount='git shortlog -sn'
 alias gcp='git cherry-pick'