Revert "Add CodeRabbit configuration for automated PR reviews"

This reverts commit deb4ca697e5e60b93db564f26771aac98ab8d55c.

.coderabbit.yaml

@@ -1,76 +0,0 @@
-language: en-US
-
-reviews:
-  request_changes_workflow: false
-  high_level_summary: true
-  poem: false
-  review_status: true
-  collapse_walkthrough: false
-  auto_review:
-    enabled: true
-    drafts: false
-  path_instructions:
-    - path: "src/**/*.cs"
-      instructions: |
-        This is a .NET 8 C# codebase (Prowlarr - an indexer/tracker manager).
-        Review for:
-        - Adherence to C# conventions: prefer `var`, avoid unnecessary `this.`, camelCase with `_` prefix for instance fields.
-        - Proper use of dependency injection patterns.
-        - Ensure database migrations are correctly numbered and non-breaking.
-        - Check for proper null handling and async/await usage.
-        - Verify API endpoints follow RESTful conventions.
-    - path: "src/Prowlarr.Api.V1/**"
-      instructions: |
-        This is the API layer. Ensure:
-        - API resources and controllers follow existing patterns.
-        - Proper HTTP status codes and error responses.
-        - No business logic leaks into controllers — delegate to services in NzbDrone.Core.
-    - path: "src/NzbDrone.Core/**"
-      instructions: |
-        This is the core business logic layer. Ensure:
-        - Services are properly injectable and follow single responsibility.
-        - Database models and migrations follow existing conventions.
-        - Localization keys are added to en.json when user-facing strings are introduced.
-    - path: "src/**/*Test*/**"
-      instructions: |
-        These are test projects. Ensure:
-        - Tests follow existing naming conventions and patterns.
-        - Adequate coverage for new functionality.
-        - Integration tests properly clean up after themselves.
-    - path: "frontend/**/*.tsx"
-      instructions: |
-        This is the React frontend (React 17, Redux, TypeScript).
-        Review for:
-        - Proper use of Redux for state management (redux-thunk, reselect).
-        - Component patterns consistent with the existing codebase.
-        - CSS modules usage for styling.
-    - path: "frontend/**/*.ts"
-      instructions: |
-        TypeScript files in the frontend. Ensure:
-        - Proper typing — avoid `any` where possible.
-        - Redux action creators and reducers follow existing patterns.
-    - path: "frontend/**/*.css"
-      instructions: |
-        CSS modules are used. Ensure:
-        - Styles follow existing conventions (PostCSS with nested, mixins, simple-vars).
-        - No hardcoded colors — use CSS variables where the project defines them.
-
-chat:
-  auto_reply: true
-
-early_access: false
-
-tone_instructions: |
-  Be concise and direct. Focus on correctness, security, and adherence to the existing
-  codebase patterns. This project is a fork of an established *arr application — consistency
-  with upstream conventions matters.
-
-knowledge_base:
-  learnings:
-    scope: auto
-  issues:
-    scope: auto
-  jira:
-    project_keys: []
-  linear:
-    team_keys: []