Fixes for podspec platforms

Author: daniele

ScrollingStackController.podspec

@@ -9,9 +9,6 @@ Pod::Spec.new do |spec|
   spec.source = { :git => 'https://github.com/malcommac/ScrollingStackController.git', :tag => "#{spec.version}" }
   spec.source_files = 'Sources/**/*.swift'
   spec.ios.deployment_target = '8.0'
-  spec.watchos.deployment_target = '2.0'
-  spec.osx.deployment_target = '10.10'
-  spec.tvos.deployment_target = '9.0'
   spec.requires_arc = true
   spec.module_name = 'ScrollingStackController'
 end