Remove unnecessary GetEnableFabric function and EnableFabricProperty from QuirkSettings

Co-authored-by: anupriya13 <54227869+anupriya13@users.noreply.github.com>

Author: Copilot

vnext/Microsoft.ReactNative/QuirkSettings.cpp

@@ -88,11 +88,6 @@ winrt::Microsoft::ReactNative::ReactPropertyId<bool> EnableSyncDetachRootViewPro
   return propId;
 }
 
-winrt::Microsoft::ReactNative::ReactPropertyId<bool> EnableFabricProperty() noexcept {
-  static winrt::Microsoft::ReactNative::ReactPropertyId<bool> propId{L"ReactNative.QuirkSettings", L"EnableFabric"};
-  return propId;
-}
-
 #pragma region IDL interface
 
 /*static*/ void QuirkSettings::SetMatchAndroidAndIOSStretchBehavior(
@@ -179,8 +174,4 @@ winrt::Microsoft::ReactNative::ReactPropertyId<bool> EnableFabricProperty() noex
   return properties.Get(EnableSyncDetachRootViewProperty()).value_or(false);
 }
 
-/*static*/ bool QuirkSettings::GetEnableFabric(ReactPropertyBag properties) noexcept {
-  return properties.Get(EnableFabricProperty()).value_or(false);
-}
-
 } // namespace winrt::Microsoft::ReactNative::implementation

vnext/Microsoft.ReactNative/QuirkSettings.h

@@ -31,8 +31,6 @@ struct QuirkSettings : QuirkSettingsT<QuirkSettings> {
   static bool GetSuppressWindowFocusOnViewFocus(winrt::Microsoft::ReactNative::ReactPropertyBag properties) noexcept;
   static bool GetUseRuntimeScheduler(winrt::Microsoft::ReactNative::ReactPropertyBag properties) noexcept;
 
-  static bool GetEnableFabric(winrt::Microsoft::ReactNative::ReactPropertyBag properties) noexcept;
-
   static void SetMapWindowDeactivatedToAppStateInactive(
       winrt::Microsoft::ReactNative::ReactPropertyBag properties,
       bool value) noexcept;