removed dead syntax rule

Change-Id: I6dcf44f93412af5573332b0a766764f1a72a3cd4

Author: trbauer

visa/CISA.l

@@ -483,12 +483,6 @@ jmp|call|ret|fret|fcall|goto {
         return BRANCH_OP;
     }
 
-fcall {
-  TRACE("\n** direct call INST ");
-        CISAlval.opcode = ISA_FCALL;
-        return FCALL;
-}
-
 ifcall {
         TRACE("\n** indirect call INST ");
         CISAlval.opcode = ISA_IFCALL;