chore(workflows): remove flow GH token from workflows

This pull request makes a minor update to the GitHub Actions workflows
for package management by removing the use of a custom GitHub token
during the checkout step. This change simplifies the workflow
configuration and relies on the default token provided by GitHub
Actions.

- Workflow configuration simplification:
* Removed the `token: ${{ secrets.FLOW_GITHUB_TOKEN }}` configuration
from the `actions/checkout@v4` step in the
`.github/workflows/deprecate-package.yml`,
`.github/workflows/publish-package.yml`, and
`.github/workflows/unpublish-package.yml` files.
[[1]](diffhunk://#diff-8667400b82f8a025158dd4bb81992ac9f2a52d1c2d0c5b0b3bcf63bbc96cf03eL26-L27)
[[2]](diffhunk://#diff-76272691d414169ea851c113f750e3f9638354d7e4473ad7131d69ec1fcea201L24-L25)
[[3]](diffhunk://#diff-21fcece5a73a9ae7591b0fa175751326c600fa9415002a28b9de4e92e40615f5L23-L24)

Author: alejandroruizponce

.github/workflows/deprecate-package.yml

@@ -23,8 +23,6 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-        with:
-          token: ${{ secrets.FLOW_GITHUB_TOKEN }}
 
       - name: Enable Corepack
         run: corepack enable

.github/workflows/publish-package.yml

@@ -21,8 +21,6 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-        with:
-          token: ${{ secrets.FLOW_GITHUB_TOKEN }}
 
       - name: Enable Corepack
         run: corepack enable

.github/workflows/unpublish-package.yml

@@ -20,8 +20,6 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-        with:
-          token: ${{ secrets.FLOW_GITHUB_TOKEN }}
 
       - name: Enable Corepack
         run: corepack enable