README.md in flipper-0.16.0

- old
+ new

@@ -6,10 +6,9 @@
 
 Any attempted write raises `Flipper::Adapters::ReadOnly::WriteAttempted`  with message  `'write attempted while in read only mode'`
 ## Usage
 ```ruby
 # example wrapping memory adapter
-require 'flipper/adapters/memory'
 require 'flipper/adapters/read_only'
 
 memory_adapter = Flipper::Adapters::Memory.new
 read_only_adapter = Flipper::Adapters::ReadOnly.new(memory_adapter)
 