i18n: unmark die messages for translation

These messages are relevant for the programmer only, not for the end
user.  Thus, they can be unmarked for translation, saving translator
some work.

Signed-off-by: Vasco Almeida <vascomalmeida@sapo.pt>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/git-bisect.sh b/git-bisect.sh
index 30d01bb..ae3cb01 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -274,7 +274,7 @@
 	check_and_set_terms $state
 	case "$#,$state" in
 	0,*)
-		die "$(gettext "Please call 'bisect_state' with at least one argument.")" ;;
+		die "Please call 'bisect_state' with at least one argument." ;;
 	1,"$TERM_BAD"|1,"$TERM_GOOD"|1,skip)
 		bisected_head=$(bisect_head)
 		rev=$(git rev-parse --verify "$bisected_head") ||