Merge branch 'improvements' into 'main'

Simplify configuration

See merge request gitlab-com/gl-infra/gitlab-dedicated/gitlab-ci-tools!5

README.md

@@ -12,8 +12,4 @@ This project includes reuseable GitLab-CI jobs for the GitLab Dedicated Project
 include:
   - project: 'gitlab-com/gl-infra/gitlab-dedicated/gitlab-ci-tools'
     file: 'golangci-lint.yml'
-
-golangci_lint:
-  variables:
-    GL_ASDF_GOLANGCI_LINT_VERSION: $GL_ASDF_GOLANGCI_LINT_VERSION
 ```

golangci-lint.yml

@@ -5,8 +5,6 @@
 # * Runs in the validate stage
 golangci_lint:
-  variables:
-    GL_ASDF_GOLANGCI_LINT_VERSION: GL_ASDF_GOLANGCI_LINT_VERSION_REQUIRED
   stage: validate
   image:
     name: golangci/golangci-lint:v${GL_ASDF_GOLANGCI_LINT_VERSION}-alpine