Remove broken GitCompare vim function

:GitDiff should be used instead

bin/xls2csv

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+for sheet in $(in2csv --names "$1")
+do
+	basename=$(echo $1 | sed -e 's/\.[^\.]\+$//')
+	in2csv --sheet "$sheet" "$1" | csvformat -D \; > "$basename-$sheet.csv"
+done

vim/plugin/git.vim

@@ -265,11 +265,6 @@ command! GitFirst call <sid>git_first() | call s:git_info()
 command! GitLast call <sid>git_last() | call s:git_info()
 command! GitInfo call <sid>git_info()
 command! -nargs=1 GitCheckout call <sid>file_at_revision(<f-args>)
-command! -nargs=? GitCompare try
-		\| call s:gitroot() | call <sid>git_diff(<f-args>)
-		\| catch
-		\| echo 'Not a git repo!' 
-		\| endtry
 command! GitRoot call <SID>cd_git_root('%')
 command! GitOrig exec 'e '.b:git_original_file
 command! ShowGitRoot try