Revert unnecessary podspec header search path change

No platform/macos directory exists since all code is inline in
platform/ios with #if TARGET_OS_OSX guards.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Saadnajmi

packages/react-native/ReactCommon/react/renderer/graphics/React-graphics.podspec

@@ -41,7 +41,7 @@ Pod::Spec.new do |s|
   if ENV['USE_FRAMEWORKS']
     s.module_name            = "React_graphics"
     s.header_mappings_dir  = "../../.."
-    header_search_paths = header_search_paths + ["\"$(PODS_TARGET_SRCROOT)/platform/ios\"", "\"$(PODS_TARGET_SRCROOT)/platform/macos\""] # [macOS]
+    header_search_paths = header_search_paths + ["\"$(PODS_TARGET_SRCROOT)/platform/ios\""]
   end
 
   s.pod_target_xcconfig  = { "USE_HEADERMAP" => "NO",