git-reset: remove unused variable

Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

git-reset.sh

@@ -3,9 +3,6 @@
 USAGE='[--mixed | --soft | --hard]  [<commit-ish>]'
 . git-sh-setup
 
-tmp=${GIT_DIR}/reset.$$
-trap 'rm -f $tmp-*' 0 1 2 3 15
-
 update=
 reset_type=--mixed
 case "$1" in