xcuserstate files are generated from within Xcode and saved in your project bundle to remember your last opened file, the open state of any group folders, open tabs, and any other user setting your project might need to remember, this is something that shouldn't be tracked in version control
Restore the Xcode rules to the Objective-C template as per the discussion
thread on 5bd4330. Although the rules correspond to an IDE and so are
global, most users of the Obj-C template expect to find the Xcode rules
in the template generated by github.com, since the IDE is so ubiquitous.
This could possibly be resolved by adding a template transclusion
mechanism in the future, but for now duplication is the way to go.
