gh actions: remove unnecessary GOPATH in go-lint

make generate-k8s-api no longer relies on the GOPATH. Therefore, it can
be moved when executing the checks in the GH action.

Signed-off-by: Marco Hofstetter <marco.hofstetter@isovalent.com>

.github/workflows/lint-go.yaml

@@ -111,8 +111,6 @@ jobs:
           # Set GOBIN to ensure 'go install' binaries end up in the same directory
           # as the one actions/setup-go adds to PATH, regardless of GOPATH.
           export GOBIN="$HOME/go/bin"
-          # check-k8s-code-gen.sh needs a GOPATH set that contains the Cilium repo at src/github.com/cilium/cilium.
-          export GOPATH="$GITHUB_WORKSPACE"
 
           cd src/github.com/cilium/cilium
           contrib/scripts/check-k8s-code-gen.sh