Merge bitcoin/bitcoin#32526: fuzz: Delete wallet_notifications

fad2faf fuzz: Delete wallet_notifications (MarcoFalke)

Pull request description:

  The fuzz target has many issues:

  * It has never found a meaningful issue.
  * It is still slow, despite bitcoin/bitcoin#28933 and bitcoin/bitcoin#31238.
  * It is unmaintained, see bitcoin/bitcoin#28882 (comment) (missing meaningful coverage) or bitcoin/bitcoin#31238 (comment) (unstable) or bitcoin/bitcoin#31467 (comment) (fix slowness), etc ...

  So remove it for now. It can be added back once one or all of the issues have been addressed.

ACKs for top commit:
  fanquake:
    ACK fad2faf
  brunoerg:
    ACK fad2faf

Tree-SHA512: e48c08352688c0eead5793ee1c7513ddd37459bc665e914a770a3f69772674ed0e14c05e5d07b333ca0ab03bb35d7d9d32561311af569958e19dc4607c11fade

Author: fanquake

src/wallet/test/fuzz/CMakeLists.txt

@@ -8,7 +8,6 @@ target_sources(fuzz
     coinselection.cpp
     crypter.cpp
     fees.cpp
-    notifications.cpp
     scriptpubkeyman.cpp
     spend.cpp
     wallet_bdb_parser.cpp