Remove platform restriction from host package's podspec

Author: kraenhansen

packages/host/react-native-node-api.podspec

@@ -25,7 +25,6 @@ Pod::Spec.new do |s|
   s.license      = package["license"]
   s.authors      = package["author"]
 
-  s.platforms    = { :ios => min_ios_version_supported }
   s.source       = { :git => "https://github.com/callstackincubator/react-native-node-api.git", :tag => "#{s.version}" }
 
   s.source_files = "ios/**/*.{h,m,mm}", "cpp/**/*.{hpp,cpp,c,h}", "weak-node-api/include/*.h", "weak-node-api/*.hpp"