Remove dangling service declaration in manifest.

This is triggering a presubmit warning.

The service was introduced in ag/11625487 as a one-time thing for
droidfooders and reverted in ag/11798167. However the revert missed this
manifest declaration.

Test: presubmit
Change-Id: I4927139d3f006b1da30e7d229cc2d573237cf415