Opcodes: remove obsolete RequireSharedFileStorage function
Opcodes: remove obsolete RequireSharedFileStorage function

While looking for occurences of the soon-to-be-eliminated
autoconf option 'ENABLE_SHARED_FILE_STORAGE', I discovered
that this function uses it, but is actually never used
anyware, thus we just delete it.

Signed-off-by: Helga Velroyen <2d0126b1ec6f9ec5cbec4a7012aa14faeaef10f5@google.com>
Reviewed-by: Thomas Thrainer <98bdeac947eb8ca18146e9ce7f092788ec242cd1@google.com>

ganeti-github-testing/ganeti-test-1,ganeti/ganeti,mbakke/ganeti,grnet/snf-ganeti,yiannist/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,apyrgio/snf-ganeti,mbakke/ganeti,leshchevds/ganeti,onponomarev/ganeti,andir/ganeti,leshchevds/ganeti,apyrgio/ganeti,bitemyapp/ganeti,andir/ganeti,leshchevds/ganeti,grnet/snf-ganeti,onponomarev/ganeti,ganeti/ganeti,ganeti/ganeti,yiannist/ganeti,bitemyapp/ganeti,dimara/ganeti,apyrgio/ganeti,dimara/ganeti,apyrgio/snf-ganeti,mbakke/ganeti,yiannist/ganeti