In d6ccccf96a Sasa Zivkov explained OSGI runtimes do not accept the
javax.annotation.* package to be provided by the application, as part
of the package is already included with the JRE.
Now that Gerrit has its own version of the @Nullable annotation, drop
the jsr305 library dependency.
Change-Id: I253fd74af7a73c5d5bc4a0b35755cc449957e0f2
57defbb9e5