Remove go module ci job

Makefile

@@ -108,10 +108,19 @@ verify-kustomize-repo: \
 prow-presubmit-check: \
 	install-tools \
 	test-unit-kustomize-plugins \
-	test-go-mod \
 	build-non-plugin-all \
 	test-examples-kustomize-against-HEAD \
 	test-examples-kustomize-against-v4-release
+	# TODO(annasong): Find permanent solution.
+	# We have temporarily commented out this job because it fails for public
+	# cross-module changes, given that we've removed replace directives with go
+	# workspace and the job runs on the latest released modules. This
+	# complicates releases.
+	# This job is also less effective than intended because it only detects
+	# go mod tidy errors, instead of any changes to the original code that
+	# go mod tidy makes.
+
+	# test-go-mod
 
 .PHONY: license
 license: $(MYGOBIN)/addlicense