docs: Clean up (#7659)

Author: igorlukanin

docs/pages/product/faqs/general.mdx

@@ -19,22 +19,3 @@ Yes. Cube Cloud provides free
 and a set of [paid tiers](https://cube.dev/pricing). Each tier comes with
 additional features, however, you're welcome to use development instances
 indefinitely if they satisfy your needs.
-
-## What is the difference between CUBEJS_CONCURRENCY and CUBEJS_DB_MAX_POOL?
-
-`CUBEJS_CONCURRENCY` specifies the maximum number of queries that can be
-executed concurrently on your source database. This variable should reflect the
-limitations of your database, and will help limit the number of queries that are
-sent from cube.
-
-`CUBEJS_DB_MAX_POOL` allows you to set a maximum number of connection pools to
-your database. This only applies to databases that use connection pooling
-(Postgresql, Redshift, Clickhouse) and is not applicable to databases without it
-(BigQuery, Snowflake). The concurrency limit specified in `CUBEJS_CONCURRENCY`
-will supersede the number of connections if it is lower.
-
-For example, if your database has a hard concurrency limit of 10 that cannot be
-changed, but you wish to raise the concurrency limit to 50 you would first set
-`CUBEJS_CONCURRENCY=50` and `CUBEJS_DB_MAX_POOL=5` or higher. Note that some
-data warehouses (BigQuery, Snowflake) do not use connection pooling so this
-parameter is not applicable.