Merge pull request #340 from Kostov6/drop-ci-steps

Remove check-manifest and docs-gen steps

Author: Kostov6

.ci/pipeline_definitions

@@ -38,22 +38,13 @@ docforge:
         output_dir: "binary"
       integration-test:
         image: "europe-docker.pkg.dev/gardener-project/releases/testmachinery/testmachinery-run:stable"
-      check-manifest:
-        image: "europe-docker.pkg.dev/gardener-project/releases/gardener-website-generator:stable"
   jobs:
     head-update:
       traits:
         draft_release: ~
     pull-request:
       traits:
         pull-request: ~
-      steps:
-        docs-gen:
-          image: "golang:1.21.0"
-          inputs:
-            BINARY: "binary"
-          depends:
-          - build
     release:
       traits:
         version: