Revert "Improve GitHub Actions specs (#15965)"

This reverts commit 6c16143.

Author: sobolevn

.github/workflows/build_wheels.yml

@@ -5,9 +5,6 @@ on:
     branches: [main, master, 'release*']
     tags: ['*']
 
-permissions:
-  contents: write
-
 jobs:
   build-wheels:
     if: github.repository == 'python/mypy'

.github/workflows/docs.yml

@@ -14,13 +14,6 @@ on:
     - CREDITS
     - LICENSE
 
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
 jobs:
   docs:
     runs-on: ubuntu-latest

.github/workflows/mypy_primer.yml

@@ -15,9 +15,6 @@ on:
     - 'mypy/test/**'
     - 'test-data/**'
 
-permissions:
-  contents: read
-
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true

.github/workflows/test.yml

@@ -15,9 +15,6 @@ on:
     - CREDITS
     - LICENSE
 
-permissions:
-  contents: read
-
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true

.github/workflows/test_stubgenc.yml

@@ -12,13 +12,6 @@ on:
     - 'mypy/stubdoc.py'
     - 'test-data/stubgen/**'
 
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
 jobs:
   stubgenc:
     # Check stub file generation for a small pybind11 project