chore(deps): remove eslint-plugin-redundant-undefined

The plugin is unmaintained and pulls braces@3.0.3 (GHSA-vfj7-8cjw-p6xm)
through @typescript-eslint/typescript-estree@6 -> globby@11.

The check is already covered by sonarjs/no-redundant-optional, enabled
through sonarjs.configs.recommended.

Same as podman-desktop/extension-kubernetes-contexts#774

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Florent Benoit <fbenoit@redhat.com>
Change-Id: I48c6b8e30928fefcc6a0d4475191376dbb62b534

Author: benoitf

eslint.config.mjs

@@ -28,7 +28,6 @@ import etc from 'eslint-plugin-etc';
 import fileProgress from 'eslint-plugin-file-progress';
 import importPlugin from 'eslint-plugin-import';
 import noNull from 'eslint-plugin-no-null';
-import redundantUndefined from 'eslint-plugin-redundant-undefined';
 import simpleImportSort from 'eslint-plugin-simple-import-sort';
 import sonarjs from 'eslint-plugin-sonarjs';
 import svelte from 'eslint-plugin-svelte';
@@ -65,7 +64,6 @@ export default [
       etc: fixupPluginRules(etc),
       import: fixupPluginRules(importPlugin),
       'no-null': fixupPluginRules(noNull),
-      'redundant-undefined': fixupPluginRules(redundantUndefined),
       'simple-import-sort': fixupPluginRules(simpleImportSort),
       vitest,
     },
@@ -191,9 +189,6 @@ export default [
       // disable this rule as it's not compliant with eslint v9
       'etc/no-commented-out-code': 'off',
 
-      // redundant-undefined custom rules
-      'redundant-undefined/redundant-undefined': 'error',
-
       // simple-import-sort custom rules
       'simple-import-sort/imports': 'error',
       'simple-import-sort/exports': 'error',

package.json

@@ -44,7 +44,6 @@
     "eslint-plugin-file-progress": "^4.0.0",
     "eslint-plugin-import": "^2.32.0",
     "eslint-plugin-no-null": "^1.0.2",
-    "eslint-plugin-redundant-undefined": "^1.0.0",
     "eslint-plugin-simple-import-sort": "^14.0.0",
     "eslint-plugin-sonarjs": "^4.2.2",
     "eslint-plugin-svelte": "^3.23.0",