O'Reilly Edit: Clarification of the Scheduler

This modification removes the discussion of flavor and flavor sizing
from the Scheduler section. While flavors sizing could be appropriate
for this section, it requires defining flavors, which might cause the
discussion to tangent.

Change-Id: I3fb63ec4f079ffa590498c22697c3f3b116c8412
Merge "O'Reilly Edit: Clarification of the Scheduler"