Fixes serious performance regression String props

6.9 introduced code that would parse the props into a Hash
unnecesarily. Any customers with significant String props took a huge
performance hit from this on page rendering.

Fix is to remove the unnecessary parsing.

I believe the parsing was done so that pretty printing of the JSON could
be done. If we introduce that feature in the future, it will:

* Be configurable on whether or not to use it.
* Possibly never run in production.

lib/react_on_rails/react_component/options.rb

@@ -13,8 +13,7 @@ def initialize(name: required("name"), options: required("options"))
       end
 
       def props
-        props = options.fetch(:props) { NO_PROPS }
-        props.is_a?(String) ? JSON.parse(ERB::Util.json_escape(props)) : props
+        options.fetch(:props) { NO_PROPS }
       end
 
       def name