hg: build-infra/jdk8: Removing old leftover from old javac server implementation. Saves a

[erik.joelsson at oracle.com]

Changeset: d6978af82ec1
Author:    erikj
Date:      2012-09-20 11:02 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/d6978af82ec1

Removing old leftover from old javac server implementation. Saves a
second on windows rebuilds.

! common/makefiles/Makefile