Remove redundant buffer size validation method

The concurrent_component_streaming_buffer_size setter already validates
the value when assigned (lines 86-92), making the separate validation
method and its call in setup_config_values unnecessary.

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

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

Author: ihabadham

react_on_rails_pro/lib/react_on_rails_pro/configuration.rb

@@ -137,7 +137,6 @@ 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
@@ -229,14 +228,6 @@ 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?