clean up changelog with changes that were already released

CHANGELOG.md

@@ -52,12 +52,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### State Machine Breaking
 
-* (apps/transfer) [\#1907](https://github.com/cosmos/ibc-go/pull/1907) Blocked module account addresses are no longer allowed to send IBC transfers. 
-* (apps/27-interchain-accounts) [\#1882](https://github.com/cosmos/ibc-go/pull/1882) Explicitly check length of interchain account packet data in favour of nil check.
-
 ### Improvements
 
-* (testing) [\#1942](https://github.com/cosmos/ibc-go/pull/1942) Add a balance for the mock module account upon testing package initialization. 
 * (linting) [\#1418](https://github.com/cosmos/ibc-go/pull/1418) Fix linting errors, resulting compatiblity with go1.18 linting style, golangci-lint 1.46.2 and the revivie linter.  This caused breaking changes in core/04-channel, core/ante, and the testing library.
 
 ### Features