intel/eu: Stop overriding exec sizes in send_indirect_message

For a long time, we based exec sizes on destination register widths.
We've not been doing that since 1ca3a94427 but a few remnants
accidentally remained.

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>

src/intel/compiler/brw_eu_emit.c

@@ -2473,9 +2473,6 @@ brw_send_indirect_message(struct brw_codegen *p,
       brw_set_src1(p, send, addr);
    }
 
-   if (dst.width < BRW_EXECUTE_8)
-      brw_inst_set_exec_size(devinfo, send, dst.width);
-
    brw_set_dest(p, send, dst);
    brw_set_src0(p, send, retype(payload, BRW_REGISTER_TYPE_UD));
    brw_inst_set_sfid(devinfo, send, sfid);