Revert PuppetCore authentication integration from shared CI workflows

.github/workflows/gem_ci.yml

@@ -30,20 +30,15 @@ on:
         default: false
         type: "boolean"
 
-# ENABLE PUPPETCORE.  The calling workflow must:
-# - Set a valid PUPPET_FORGE_TOKEN secret on its repository.
-# - Set ruby_version >= 3.1 to override this workflow's default 2.7; otherwise bundle install will fail.
-env:
-  PUPPET_GEM_VERSION: ${{ inputs.puppet_gem_version }}
-  CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
-  PUPPET_FORGE_TOKEN: ${{ secrets.PUPPET_FORGE_TOKEN }}
-  BUNDLE_RUBYGEMS___PUPPETCORE__PUPPET__COM: "forge-key:${{ secrets.PUPPET_FORGE_TOKEN }}"
-
 jobs:
   spec:
     name: "spec"
     runs-on: ${{ inputs.runs_on }}
 
+    env:
+      PUPPET_GEM_VERSION: ${{ inputs.puppet_gem_version }}
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
     steps:
       - name: "checkout"
         uses: "actions/checkout@v4"

.github/workflows/module_ci.yml

@@ -25,12 +25,6 @@ on:
         default: '3.1'
         type: "string"
 
-# ENABLE PUPPETCORE.  The calling workflow must:
-# - Set a valid PUPPET_FORGE_TOKEN secret on its repository.
-# - Set ruby_version >= 3.1 to override this workflow's default 2.7; otherwise bundle install will fail.
-env:
-  PUPPET_FORGE_TOKEN: ${{ secrets.PUPPET_FORGE_TOKEN }}
-  BUNDLE_RUBYGEMS___PUPPETCORE__PUPPET__COM: "forge-key:${{ secrets.PUPPET_FORGE_TOKEN }}"
 
 jobs:
   setup_matrix:

.github/workflows/tooling_mend_ruby.yml

@@ -25,11 +25,6 @@ env:
   MEND_TOKEN: ${{ secrets.MEND_TOKEN != '' && secrets.MEND_TOKEN || inputs.token }}
   PRODUCT_NAME: ${{ inputs.PRODUCT_NAME != '' && inputs.PRODUCT_NAME || inputs.product_name }}
   REQUIRE_SECRETS: MEND_API_KEY MEND_TOKEN
-  # ENABLE PUPPETCORE.  The calling workflow must:
-  # - Set a valid PUPPET_FORGE_TOKEN secret on its repository.
-  # - Set ruby_version >= 3.1 to override this workflow's default 2.7; otherwise bundle install will fail.
-  PUPPET_FORGE_TOKEN: ${{ secrets.PUPPET_FORGE_TOKEN }}
-  BUNDLE_RUBYGEMS___PUPPETCORE__PUPPET__COM: "forge-key:${{ secrets.PUPPET_FORGE_TOKEN }}"
 
 jobs:
   mend: