fix(presets)!: remove compatibility:additionalBranchPrefix (#22015)

BREAKING CHANGE: v25 compatibility for language-based branch prefixes is removed

lib/config/presets/common.ts

@@ -12,6 +12,7 @@ export const removedPresets: Record<string, string | null> = {
   ':masterIssueApproval': ':dependencyDashboardApproval',
   ':switchToGradleLite': null,
   ':unpublishSafe': 'npm:unpublishSafe',
+  'compatibility:additionalBranchPrefix': null,
   'config:application': 'config:js-app',
   'config:base-js': 'config:base',
   'config:library': 'config:js-lib',

lib/config/presets/internal/compatibility.ts

-import type { Preset } from '../types';
-
-/* eslint sort-keys: ["error", "asc", {caseSensitive: false, natural: true}] */
-
-export const presets: Record<string, Preset> = {
-  additionalBranchPrefix: {
-    buildkite: {
-      additionalBranchPrefix: 'buildkite-',
-    },
-    cargo: {
-      additionalBranchPrefix: 'rust-',
-    },
-    description:
-      'Backwards-compatibility preset to restore `additionalBranchPrefix` settings for multiple managers which were removed in Renovate `v25`.',
-    docker: {
-      additionalBranchPrefix: 'docker-',
-    },
-    homebrew: {
-      additionalBranchPrefix: 'homebrew-',
-    },
-    packageRules: [
-      {
-        additionalBranchPrefix: 'helm-',
-        matchDatasources: ['helm'],
-      },
-    ],
-  },
-};

lib/config/presets/internal/index.ts

 import type { Preset, PresetConfig } from '../types';
-import * as compatibilityPreset from './compatibility';
 import * as configPreset from './config';
 import * as defaultPreset from './default';
 import * as dockerPreset from './docker';
@@ -17,7 +16,6 @@ import * as workaroundsPreset from './workarounds';
 /* eslint sort-keys: ["error", "asc", {caseSensitive: false, natural: true}] */
 
 export const groups: Record<string, Record<string, Preset>> = {
-  compatibility: compatibilityPreset.presets,
   config: configPreset.presets,
   default: defaultPreset.presets,
   docker: dockerPreset.presets,