Update CK to 0.31 everywhere

Summary: Thisi diff updates the CK version to > 0.31 everywhere. It also removes direct CK dependency on SampleSwift, as it doesn't use CK directly.

Reviewed By: fabiomassimo

Differential Revision: D28898898

fbshipit-source-id: 77d4cece79a0a4a51e7ac27b3ec68283740cd0b2

iOS/SampleSwift/Podfile

@@ -20,5 +20,4 @@ target 'SampleSwift' do
   pod 'boost-for-react-native', :configuration => 'Debug'
   pod 'OpenSSL-Universal', :configuration => 'Debug'
   pod 'CocoaAsyncSocket', :configuration => 'Debug'
-  pod 'ComponentKit', '~> 0.30'
 end