[GOT-47] Remove configurable `MaxRowCount`

[dtbuchholz]

Since the maximum number of rows is a protocol definition and cannot be configured by an indiviual validator, the TableContraints > MaxRowCount key/value should be removed from the following:

go-tableland/docker/deployed/testnet/api/config.json

Line 19 in bbfa561

"MaxRowCount": 500000

As noted by @jsign:

For example, if the limit is X and a table has X rows, then a further insertion will make the query fail (as defined in the spec).
If someone bumps that X, then that query won't fail and they'll "fork" from the rest of the network.

_GOT-47