Remove some unused aliases/functions.

lib/directories.zsh

@@ -15,16 +15,6 @@ alias cd....='cd ../../..'
 alias cd.....='cd ../../../..'
 alias cd/='cd /'
 
-alias 1='cd -'
-alias 2='cd +2'
-alias 3='cd +3'
-alias 4='cd +4'
-alias 5='cd +5'
-alias 6='cd +6'
-alias 7='cd +7'
-alias 8='cd +8'
-alias 9='cd +9'
-
 cd () {
   if   [[ "x$*" == "x..." ]]; then
     cd ../..

lib/functions.zsh

@@ -32,15 +32,3 @@ function uninstall_oh_my_zsh() {
 function upgrade_oh_my_zsh() {
   /bin/sh $ZSH/tools/upgrade.sh
 }
-
-function tab() {
-  osascript 2>/dev/null <<EOF
-    tell application "System Events"
-      tell process "Terminal" to keystroke "t" using command down
-    end
-    tell application "Terminal"
-      activate
-      do script with command "cd \"$PWD\"; clear; $*" in window 1
-    end tell
-EOF
-}