disable redundant GitHub Actions (#926)

.github/workflows/integration_tests.yml

@@ -1,8 +1,5 @@
 name: Run Integration Tests
-on:
-  workflow_run:
-    workflows: ["AndroidX Presubmits"]
-    types: [completed]
+on: {}
 
 jobs:
   run_integration_tests:

.github/workflows/jbpresubmit.yml

@@ -5,24 +5,7 @@
 
 # The aim of this workflow is to run checks and some tests before submitting the CL upstream.
 name: JB-COMPOSE-variant of AndroidX Presubmits
-on:
-  push:
-    branches:
-      - jb_cl*
-      - jb_presubmit*
-
-  pull_request:
-    branches:
-      - jb-main
-      - jb_presubmit*
-      - jb_cl*
-    types:
-      - opened
-      - reopened
-      - synchronize
-
-  # Allows to run this workflow manually from the Actions tab
-  workflow_dispatch:
+on: {}
 
 jobs:
   setup:

.github/workflows/presubmit.yml

@@ -1,7 +1,5 @@
 name: AndroidX Presubmits
-on:
-  push:
-  pull_request:
+on: {}
 
 env:
   # Allow precise monitoring of the save/restore of Gradle User Home by `gradle-build-action`

.github/workflows/prune_artifacts.yml

@@ -1,8 +1,5 @@
 name: "Prune old artifacts"
-on:
-  schedule:
-    - cron: "0 0 * * 0"
-  workflow_dispatch:
+on: {}
 
 jobs:
   delete-artifacts:

.github/workflows/register_workflow_start.yml

@@ -1,8 +1,5 @@
 name: Register Workflow Run with AndroidX
-on:
-  workflow_run:
-    workflows: ["AndroidX Presubmits"]
-    types: [requested]
+on: {}
 
 jobs:
   ping_androidx_dev:

.github/workflows/scorecards.yml

@@ -1,11 +1,5 @@
 name: Scorecards supply-chain security
-on:
-  # Only the default branch is supported.
-  branch_protection_rule:
-  schedule:
-    - cron: '24 14 * * 1'
-  push:
-    branches: [ androidx-main ]
+on: {}
 
 # Declare default permissions as read only.
 permissions: read-all

.github/workflows/update_prebuilts.yml

@@ -2,19 +2,7 @@
 # To run it, navigate to https://github.com/androidx/androidx/actions/workflows/update_prebuilts.yml
 # and click "Run workflow"
 name: Update Prebuilts
-on:
-  workflow_dispatch:
-    inputs:
-      target-branch:
-        description: 'The target branch for the PR'
-        required: false
-        default: 'androidx-main'
-        type: string
-      comment:
-        description: 'Any comment you would like to add to the PR body'
-        required: false
-        default: ''
-        type: string
+on: {}
 jobs:
   update-prebuilts:
     runs-on: ubuntu-latest