Remove Notification atom

There's no logging implmentation of Notification atom, therefore
removing it.

Bug: 130183311
Fix: 130183311
Test: make statsd
Change-Id: Ibd4b552fd4f81026401e394079526c5d1bf7bdae
1 file changed
tree: 7c389675053a4409c18e39bbbef940350760768b
  1. atom_field_options.proto
  2. atoms.proto