Deletion of Premiership of Fidel Castro

Comment: Presidency of Fidel Castro with Premiership of Fidel Castro, per , pending FA development at Fidel Castro for detail that may be better off trimmed from the main article. It may be that the merged article should then be renamed, I don't have a rename proposal in mind however
Stance: merge
Cited policy: Wikipedia:Editing policy (WP:PRESERVE)