update-go-version: remove regex for ubi8/go-toolset images

In previous commit we switched the ubi8/go-toolset images to openshift
ci images so now there is no ubi8/go-toolset base image in any
containerfile. This PR remove that sed command for replace go version
for ubi8/go-toolset.

update-go-version.sh

@@ -15,8 +15,6 @@ go mod edit -go "${golang_base_version}.0" tools/go.mod
 sed -i "s,^GOVERSION = 1.[0-9]\+,GOVERSION = ${golang_base_version}," Makefile
 sed -i "s,^\(FROM registry.ci.openshift.org/openshift/release:rhel-8-release-golang-\)1.[0-9]\+,\1${golang_base_version}," images/*/Dockerfile
 sed -i "s,^\(FROM registry.ci.openshift.org/openshift/release:rhel-8-release-golang-\)1.[0-9]\+,\1${golang_base_version}," images/*/Containerfile
-sed -i "s,^FROM registry.access.redhat.com/ubi8/go-toolset:[.0-9]\+,FROM registry.access.redhat.com/ubi8/go-toolset:${golang_base_version}," images/*/Dockerfile
-sed -i "s,^FROM registry.access.redhat.com/ubi8/go-toolset:[.0-9]\+,FROM registry.access.redhat.com/ubi8/go-toolset:${golang_base_version}," images/*/Containerfile
 for f in .github/workflows/*.yml; do
     if [ $(yq  eval '.jobs.build.strategy.matrix | has("go")' "$f") == "true" ]; then
       yq eval --inplace ".jobs.build.strategy.matrix.go[0] = ${golang_base_version} | .jobs.build.strategy.matrix.go[0] style=\"single\"" "$f";