DOC-6035 RS: Clarified in Active-Active limitations that flash is not supported

Author: rrelledge

content/operate/rs/databases/active-active/planning.md

@@ -86,5 +86,5 @@ Active-Active databases have the following limitations:
 - The `UNLINK` command is a blocking command for all types of keys.
 - Cross slot multi commands (such as `MSET`) are not supported with Active-Active databases.
 - The hashing policy can't be changed after database creation.
-- If an Active-Active database [runs on flash memory]({{<relref "/operate/rs/databases/flash">}}), you cannot add participating clusters that run on RAM only.
+- Flash memory is not supported for Active-Active databases.
 - Active-Active databases handle replication internally and do not support the `redis.set_repl()` function in Lua scripts.