.github/workflows: Remove golangci-lint

The previous commit broke the golangci-lint test [1] because the GitHub
Action runs on Ubuntu 22.04, which only has Shadow 4.8 [2], whereas
libsubid.so was introduced in Shadow 4.9 [3].

However, that's not a big deal because 'go vet' was earlier added to the
set of tests run by 'meson test' [4], and 'go vet' is one of the linters
run by golangci-lint [5].  So, while it's not a proper replacement, it's
good enough.

[1] Commit ca8007c192
    https://github.com/containers/toolbox/pull/1180

[2] https://packages.ubuntu.com/source/jammy/shadow
    https://packages.ubuntu.com/source/jammy-updates/shadow

[3] Shadow commit 0a7888b1fad613a0
    https://github.com/shadow-maint/shadow/commit/0a7888b1fad613a0
    https://github.com/shadow-maint/shadow/issues/154

[4] Commit f695012faf
    https://github.com/containers/toolbox/pull/1186

[5] https://golangci-lint.run/usage/linters/
    https://golangci-lint.run/usage/linters/#govet

This reverts commit 7c86f30b77.

https://github.com/containers/toolbox/pull/1221

.github/workflows/linting.yaml

@@ -1,24 +0,0 @@
-name: Golangci Lint
-
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-
-permissions:
-  contents: read
-  pull-requests: read
-
-jobs:
-  golangci:
-    name: Lint
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v2
-        with:
-          version: latest
-          working-directory: ./src