.cirrus.yml: rm GOLANGCILINT_CACHE

It is not used since commit b63d51f3 ("cirrus-ci: rm make validate").

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

common/.cirrus.yml

@@ -9,7 +9,6 @@ env:
     GOPATH: &gopath "/var/tmp/go"
     GOBIN: "${GOPATH}/bin"
     GOCACHE: "${GOPATH}/cache"
-    GOLANGCI_LINT_CACHE: "$GOCACHE"
     GOSRC: &gosrc "${GOPATH}/src/github.com/containers/common"
     CIRRUS_WORKING_DIR: *gosrc
     # The default is 'sh' if unspecified
@@ -47,7 +46,6 @@ testing_task:
   env:
     NETAVARK_BINARY: "/usr/libexec/podman/netavark"
   test_script:
-    - mkdir "$GOLANGCI_LINT_CACHE"
     - export PATH="$PATH:$GOPATH/bin"
     - gpg --batch --passphrase '' --quick-gen-key tester@localhost default default never
     - make vendor