Change NS port resize detection

Change NS port resize detection

* src/nsterm.m ([EmacsView windowDidResize:]): Remove function, it's
not performing a useful function any more.
([EmacsView viewDidResize]):
([EmacsView resizeWithOldSuperviewSize:]): Replace viewDidResize with
resizeWithOldSuperviewSize.
([EmacsView initFrameFromEmacs:]): Remove the view resize notification
as we don't need it any more.