Remove caveats about local disk cache from README
Remove caveats about local disk cache from README

glandium/sccache,luser/sccache2,mozilla/sccache,glandium/sccache,mozilla/sccache,luser/sccache2,luser/sccache2,luser/sccache2,glandium/sccache,mozilla/sccache,glandium/sccache