Remove an unsed target from Makefile

notcompute.yaml seems to be unsed for a while, but it's
still present in Makefile (its dependencies were removed
by change I952c630ca424d114feb643a6c34d182cad660f26).

Change-Id: If5d84bd822f748c962cdb2b95b6bbd5d5e1f11fa
Merge "Remove an unsed target from Makefile"