Update tooling for 4.9 eol

(if there is a 4.10, rebase to keep `.githup/workflows/labeler.yml` and only remove 4.9 parts of `.github/labeler.yml`)

No-Issue

.github/dependabot.yml

@@ -19,66 +19,16 @@ updates:
           - "react"
           - "react-dom"
 
-  - package-ecosystem: 'npm'
-    directory: '/'
-    target-branch: 'stable-4.9'
-    schedule:
-      interval: 'monthly'
-    commit-message:
-      prefix: '[stable-4.9] '
-    groups:
-      babel:
-        patterns:
-          - "@babel/*"
-          - "babel-core"
-          - "babel-loader"
-      lingui:
-        patterns:
-          - "@lingui/*"
-      react:
-        patterns:
-          - "react"
-          - "react-dom"
-          - "@types/react"
-          - "@types/react-dom"
-    ignore:
-      - dependency-name: '@lingui/*'
-        update-types: ['version-update:semver-major']
-      - dependency-name: '@patternfly/*'
-        update-types: ['version-update:semver-major']
-      - dependency-name: '@types/*'
-        update-types: ['version-update:semver-major']
-      - dependency-name: 'react'
-        update-types: ['version-update:semver-major']
-      - dependency-name: 'react-dom'
-        update-types: ['version-update:semver-major']
-
   # npm in test/
 
   - package-ecosystem: 'npm'
     directory: '/test'
     schedule:
       interval: 'weekly'
 
-  - package-ecosystem: 'npm'
-    directory: '/test'
-    target-branch: 'stable-4.9'
-    schedule:
-      interval: 'monthly'
-    commit-message:
-      prefix: '[stable-4.9] '
-
   # github-actions
 
   - package-ecosystem: 'github-actions'
     directory: '/'
     schedule:
       interval: 'weekly'
-
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    target-branch: 'stable-4.9'
-    commit-message:
-      prefix: '[stable-4.9] '
-    schedule:
-      interval: "monthly"

.github/workflows/i18n.yml

@@ -15,7 +15,6 @@ jobs:
       matrix:
         branch:
         - 'master'
-        - 'stable-4.9'
 
     steps:
 

README.md

@@ -109,10 +109,5 @@ List by branches:
 ## Version mapping
 
 Our branches, backport labels, releases and tags use AAH versions, but Jira uses AAP versions.
-To map between the two:
-
-|AAP version|AAH version|
-|-|-|
-|2.4|4.9|
 
 [Table with component versions](https://github.com/ansible/galaxy_ng/wiki/Galaxy-NG-Version-Matrix)