Remove unnecessary Maven repositories

None of the repositories sepcified in the parent pom are necessary,
with the exception of the JGit repository (and that is only useful
for SNAPSHOT releases) and the Google one (primarily for the gwtorm
and related gwt dependencies). Remove the unnecessary cruft.

Change-Id: Idd2f28565127d6dd7bb28c6b0b3cd05679864cbc
1 file changed