Merge bitcoin/bitcoin#30344: kernel: remove mempool_persist

f1478c0545 mempool: move LoadMempool/DumpMempool to node (Cory Fields)
6d242ff1e9 kernel: remove mempool_persist.cpp (Cory Fields)

Pull request description:

  DumpMempool/LoadMempool are not necessary for the kernel.

  Noticed while working on instantiated logging.

  I suppose these could have been left in on purpose, but I'm assuming it was probably just an oversight.

ACKs for top commit:
  TheCharlatan:
    Re-ACK f1478c0545
  glozow:
    ACK f1478c0545
  stickies-v:
    ACK f1478c0545

Tree-SHA512: 5825da0cf2e67470524eb6ebe397eb90755a368469a25f184df99ab935b3eb6d89eb802b41a6c3661e869bba3bbfa8ba9d95281bc75ebbf790ec5d9d1f79c66f

src/init.cpp

@@ -8,7 +8,6 @@
 #include <init.h>
 
 #include <kernel/checks.h>
-#include <kernel/mempool_persist.h>
 #include <kernel/validation_cache_sizes.h>
 
 #include <addrman.h>
@@ -51,6 +50,7 @@
 #include <node/interface_ui.h>
 #include <node/kernel_notifications.h>
 #include <node/mempool_args.h>
+#include <node/mempool_persist.h>
 #include <node/mempool_persist_args.h>
 #include <node/miner.h>
 #include <node/peerman_args.h>
@@ -119,8 +119,6 @@
 using common::AmountErrMsg;
 using common::InvalidPortErrMsg;
 using common::ResolveErrMsg;
-using kernel::DumpMempool;
-using kernel::LoadMempool;
 using kernel::ValidationCacheSizes;
 
 using node::ApplyArgsManOptions;
@@ -130,6 +128,8 @@ using node::CalculateCacheSizes;
 using node::DEFAULT_PERSIST_MEMPOOL;
 using node::DEFAULT_PRINTPRIORITY;
 using node::DEFAULT_STOPATHEIGHT;
+using node::DumpMempool;
+using node::LoadMempool;
 using node::KernelNotifications;
 using node::LoadChainstate;
 using node::MempoolPath;