util/release: Don't try to remove a file named like a long string

Change-Id: I81fcb58720fb20ac4f57e31e9f991f5009aba568
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37020
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

util/release/genrelnotes

@@ -192,7 +192,6 @@ version_ctrl_c() {
 		-exec rename 's/gnumakefile/Makefile\.inc/' {} \;
 	git checkout origin/master > /dev/null 2>&1
 	git submodule update --init --checkout  > /dev/null 2>&1
-	rm -f "$mainboard_list_old" "$mainboard_list_new"
 	rm "$LOGFILE"
 	exit 1;
 }