fix: replace directive should not exist

hack/install-go-tools.sh

@@ -9,11 +9,12 @@ fi
 
 cd "$(dirname $BASH_SOURCE)/.."
 
-go install github.com/bwplotka/bingo@latest
+go install -mod=readonly github.com/bwplotka/bingo@latest
 
 # The following PR has been merged in bingo:
 # https://github.com/bwplotka/bingo/pull/142
 # Once the new bingo version is released, make sure to append '-t 0' in below commands
+unset GOFLAGS
 bingo get -v -l github.com/prometheus/prometheus/cmd/promtool@v0.48.0
 bingo get -v -l github.com/cloudflare/pint/cmd/pint@v0.44.1
-go install github.com/prometheus-operator/prometheus-operator/cmd/po-lint
+go install -mod=readonly github.com/prometheus-operator/prometheus-operator/cmd/po-lint