util/testing: Remove test for util/broadcom/secimage

util/broadcom/secimage was removed in commit aea00f496b1, so don't
try to test it anymore.

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: Ibcc018a6b8ed4ecd407f2dc374cec62900920a92
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46805
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/util/testing/Makefile.inc b/util/testing/Makefile.inc
index fb36c71..494055e 100644
--- a/util/testing/Makefile.inc
+++ b/util/testing/Makefile.inc
@@ -115,8 +115,6 @@
 	@echo "Build testing $(TOOLLIST)"
 	$(foreach tool, $(TOOLLIST), $(MAKE) -C util/$(tool) clean ; )
 	$(foreach tool, $(TOOLLIST), echo "Building $(tool)";export MFLAGS= ;export MAKEFLAGS= ;$(MAKE) -C util/$(tool) all V=$(V) Q=$(Q) || exit 1; )
-	echo "Testing broadcom/secimage"
-	$(MAKE) -C util/broadcom/secimage test
 	@echo "Running gitconfig tests"
 	@for test in $$(find util/gitconfig/test -maxdepth 1 \
 		-type f -executable); do \