Remove redundant buffer size validation method

The concurrent_component_streaming_buffer_size setter already validates
the value when assigned (lines 91-97), making the separate validation
method unnecessary. This was identified in code review as duplicate logic.

The setter is called during initialization (line 136) and any subsequent
assignments, providing complete validation coverage. Removing the
duplicate validation method simplifies the codebase without changing
behavior.

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

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

Author: ihabadham

react_on_rails_pro/lib/react_on_rails_pro/configuration.rb

@@ -142,7 +142,6 @@ def setup_config_values
       validate_remote_bundle_cache_adapter
       setup_renderer_password
       setup_assets_to_copy
-      validate_concurrent_component_streaming_buffer_size
       setup_execjs_profiler_if_needed
       check_react_on_rails_support_for_rsc
     end
@@ -234,14 +233,6 @@ def validate_remote_bundle_cache_adapter
       end
     end
 
-    def validate_concurrent_component_streaming_buffer_size
-      return if concurrent_component_streaming_buffer_size.is_a?(Integer) &&
-                concurrent_component_streaming_buffer_size.positive?
-
-      raise ReactOnRailsPro::Error,
-            "config.concurrent_component_streaming_buffer_size must be a positive integer"
-    end
-
     def setup_renderer_password
       return if renderer_password.present?