Merge bitcoin/bitcoin#34160: policy: Remove stale rationale paragraph

337b4a2 Remove stale rationale paragraph (flack)

Pull request description:

  It belonged to the note removed in #33892

ACKs for top commit:
  instagibbs:
    ACK 337b4a2

Tree-SHA512: 3cb1d3b87aa42ff92130af10ce2c286c0d83cbfdf17096d47b540ffe8e1a9a4727aedb8d477599fbff0002d7e262a6a52549dcccfa38dbe61281c221cf26cae2

Author: fanquake

doc/policy/packages.md

@@ -99,14 +99,6 @@ submitted as a package.
 transaction (i.e. in which a replacement transaction with a higher fee cannot be signed) being
 rejected from the mempool when transaction volume is high and the mempool minimum feerate rises.
 
-*Rationale*: Avoid situations in which the mempool contains non-bumped transactions below min relay
-feerate (which we consider to have pay 0 fees and thus receiving free relay). While package
-submission would ensure these transactions are bumped at the time of entry, it is not guaranteed
-that the transaction will always be bumped. For example, a later transaction could replace the
-fee-bumping child without still bumping the parent. These no-longer-bumped transactions should be
-removed during a replacement, but we do not have a DoS-resistant way of removing them or enforcing a
-limit on their quantity. Instead, prevent their entry into the mempool.
-
 Implementation Note: Transactions within a package are always validated individually first, and
 package validation is used for the transactions that failed. Since package feerate is only
 calculated using transactions that are not in the mempool, this implementation detail affects the