Fix references to read-calls and write-calls

[solatis]

There are still references to read-rows-calls from the information model, and I think the write-rows-calls / upsert-rows-calls are not required anymore either since the 0.10 refactoring.

For the sake of clarity, we should probably remove all of them since 0.10 broke API compatibility with 0.9 anyway.

[joefromct]

FYI, this makes the example (the only one?) impossible to use with the current versions.

[lbradstreet]

Thanks for the note. We'll have to update it.