Remove call to suggest image from README
Looks like this is now done!
@@ -7,8 +7,6 @@ A *fast* JSON parser and Object marshaller as a Ruby gem.
Version 3.0 is out! 3.0 provides better json gem and Rails compatibility. It
also provides additional optimization options.
-Please check out issue #364 and help pick or suggest a image to represent Oj.
-
## Using
```ruby
