Remove area- assignment rule as we now rely on dotnet-issue-labeler to handle this (#57775)

Without this change many PRs were getting labeled with duplicate labels and this automation was very invasive, as the labelers were getting added even after removing some labels manually. Here is an example PR where I've noticed this: #55847

Author: mkArtakMSFT

.github/policies/resourceManagement.yml

@@ -293,130 +293,6 @@ configuration:
       - addLabel:
           label: 'Attention: Shared Code Modified'
       description: '[Shared Code PRs] Flag PRs that affect shared code src/Shared/Runtime'
-    - if:
-      - payloadType: Pull_Request
-      then:
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/Components/
-            - src/ProjectTemplates/BlazorWasm.ProjectTemplates/
-        then:
-        - addLabel:
-            label: area-blazor
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/Tools/
-        then:
-        - addLabel:
-            label: area-commandlinetools
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/DataProtection/
-        then:
-        - addLabel:
-            label: area-dataprotection
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/Identity/
-        then:
-        - addLabel:
-            label: area-identity
-      - if:
-        - includesModifiedFiles:
-            files:
-            - global.json
-            - .azure
-            - .config
-            - .github
-            - eng
-            - src/Framework/
-            - src/Installers/
-        then:
-        - addLabel:
-            label: area-infrastructure
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/ProjectTemplates/
-            - src/Razor/
-            - src/Mvc/Mvc.Localization/
-            - src/Mvc/Mvc.DataAnnotations/
-            - src/Mvc/Mvc.Razor.RuntimeCompilation/
-            - src/Mvc/Mvc.Razor/
-            - src/Mvc/Mvc.RazorPages/
-            - src/Mvc/Mvc.TagHelpers/
-            - src/Mvc/Mvc.ViewFeatures/
-        then:
-        - addLabel:
-            label: area-mvc
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/Security/
-            - src/Azure/AzureAD/
-        then:
-        - addLabel:
-            label: area-security
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/Servers/
-            - src/Http/
-            - src/Azure/AzureAppServicesIntegration/
-            - src/Azure/AzureAppServices.HostingStartup/
-            - src/Middleware/
-            - src/HttpClientFactory/
-            - src/SiteExtensions/
-        then:
-        - addLabel:
-            label: area-networking
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/SignalR/
-        then:
-        - addLabel:
-            label: area-signalr
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/Grpc/
-        then:
-        - addLabel:
-            label: area-grpc
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/Mvc/Mvc.Abstractions/
-            - src/Mvc/Mvc.Analyzers/
-            - src/Mvc/Mvc.Api.Analyzers/
-            - src/Mvc/Mvc.ApiExplorer/
-            - src/Mvc/Mvc.Core/
-            - src/Mvc/Mvc.Cors/
-            - src/Mvc/Mvc.Formatters.Json/
-            - src/Mvc/Mvc.Formatters.Xml/
-            - src/Mvc/Mvc.NewtonsoftJson/
-            - src/Mvc/Mvc.Testing.Tasks/src/
-            - src/Mvc/Mvc.Testing/
-            - src/Mvc/Mvc/
-            - src/OpenApi/
-            - src/Mvc/perf/
-        then:
-        - addLabel:
-            label: area-mvc
-      - if:
-        - includesModifiedFiles:
-            files:
-            - src/DefaultBuilder/
-            - src/Hosting/
-        then:
-        - addLabel:
-            label: area-hosting
-      description: '[PR Labelling] Apply `area-` labels to PRs'
     - if:
       - payloadType: Pull_Request
       - labelAdded: