Revert "storage_proxy: Enforce partition_limit"
Revert "storage_proxy: Enforce partition_limit"

This reverts commit 141ea49e05072f70daf481bda53303adc2820afa.

There was a confusion around the meaning of "partition limit".
Parts of our code interpreted it just as "maximum number of partitions".
This is also how Cassandra behaves.

However, the other parts of the code, including data query, interpreted
it as "maximum number of live partitions" or otherwise skipped dead
partitions resulting in #1447.

A decision has been made to stick to the "maximum number of live
partitions" interpretation everywhere. The consequences are, among
others, that the patch reverted by this one is no longer correct.

While, the actual series fixing the interpretations of partition limit
and getting rid of the confusion is yet to come, the purpose of this
revert is to make backporting easier (as the patch being reverted
hasn't made it to branch-1.3 yet).

kjniemi/scylla,kjniemi/scylla,scylladb/scylla,scylladb/scylla,raphaelsc/scylla,scylladb/scylla,kjniemi/scylla,duarten/scylla,raphaelsc/scylla,avikivity/scylla,avikivity/scylla,raphaelsc/scylla,avikivity/scylla,scylladb/scylla,duarten/scylla,duarten/scylla