rdbms: Don't forward DB connection handle to transaction callbacks

Why:

- When a transaction lifecycle callback such as
  onTransactionPreCommitOrIdle() is invoked by rdbms, rdbms passes in
  the DB connection handle the callback was scheduled on.
- However, the DB connection handle may have since been reset to a
  different DB domain on the same physical cluster due to connection
  reuse.
- We could implement bookkeeping to keep track of the expected DB domain
  for each pending callback and ensure the passed-in DB handle matches
  that before invoking the callback, but nobody seems to be making use
  of the passed-in DB handle except for two call sites in core.
 - As such, it seems more prudent to remove this functionality.

What:

- Stop passing the DB connection handle to rdbms transaction lifecycle
  callbacks.

Bug: T386190
Change-Id: I9125bfb8b5e2cac4aab3525ffd229ea49beccc17

0 files changed, 0 insertions, 0 deletions