Remove useless hack that avoids calling LLVMLinkInInterpreter()

This is supposed to force-link the Interpreter, by inserting a dead
call to LLVMLinkInInterpreter().
Since it is actually an empty function, there is no reason for the
call to be dead.

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 254956