Removed ProfileDump gRPC command.

As stated by @per1234:

> Build profile data is already provided via the LoadSketch method, so it
> seems that even a mechanism that is truly for getting profile data should
> be implemented by simply expanding the SketchProfile message to contain
> all the data of the build profile (actually kind of silly that it
> currently only provides a subset of the profile data).

#3019 (comment)

Author: cmaglie