Fix ReactOnRailsPro::Utils constant detection

The previous fix in PR #2108 added an overly cautious check that prevented
Pro gem detection even when properly loaded:

  return false unless defined?(ReactOnRailsPro::Utils)

This caused tests to fail with:
"NoMethodError: undefined method \`with_trace' for ReactOnRailsPro::Utils:Module"

The issue: After `require "react_on_rails_pro"`, the Utils module IS loaded
(confirmed by checking react_on_rails_pro.rb which requires utils.rb), but
the check was still failing and returning false prematurely.

Solution: Remove the overly cautious Utils check. The existing error handling
(rescue NameError, LoadError) is sufficient to catch any constant loading
issues. The `require "react_on_rails_pro"` ensures Utils is loaded since
react_on_rails_pro.rb explicitly requires it (line 10).

This fixes the test failures while maintaining protection against
uninitialized constant errors.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

lib/react_on_rails/utils.rb

@@ -272,9 +272,8 @@ def self.react_on_rails_pro?
         return false unless gem_available?("react_on_rails_pro")
         return false unless pro_gem_in_bundle?
 
-        # Guard against edge cases where constant exists but module isn't fully loaded
+        # Ensure Pro gem is loaded (handles uninitialized constant errors)
         require "react_on_rails_pro" unless defined?(ReactOnRailsPro)
-        return false unless defined?(ReactOnRailsPro::Utils)
 
         ReactOnRailsPro::Utils.validated_license_data!.present?
       rescue NameError, LoadError