remove adding git version to autojump install

tools/git-version.sh

@@ -1,18 +0,0 @@
-#!/usr/bin/env bash
-# add git revision to autojump
-
-# Fail silently if there is no git directory, ie. if the user installed from a regular download
-if [[ ! -d .git ]]; then
-    exit
-fi
-
-if [ -z "$1" ]; then
-    gitrevision=`git describe`
-    if [[ $(git diff --shortstat 2> /dev/null | tail -n1) != "" ]]; then
-        gitrevision=$gitrevision"-dirty"
-    fi
-else
-    gitrevision="$1"
-fi
-
-sed -i "s/^VERSION = \".*\"$/VERSION = \"$gitrevision\"/" ./bin/autojump