Merge bitcoin/bitcoin#26360: build: remove threadinterrupt from libbitcoinkernel

afbcd22 build: remove threadinterrupt from libbitcoinkernel (fanquake)

Pull request description:

  Extracted from #26292.

ACKs for top commit:
  hebasto:
    ACK afbcd22, tested on Ubuntu 22.04.
  ryanofsky:
    Code review ACK afbcd22

Tree-SHA512: 9d355f0e417561be41cdd0674a8f94c9ffe3ecfb4063bb9c90f1032cb9d471be11d4fa26de40993e3a411e015272201551fbbb3d3c2b43e4c17bf49386a2741c

Author: fanquake

src/Makefile.am

@@ -937,7 +937,6 @@ libbitcoinkernel_la_SOURCES = \
   support/cleanse.cpp \
   support/lockedpool.cpp \
   sync.cpp \
-  threadinterrupt.cpp \
   txdb.cpp \
   txmempool.cpp \
   uint256.cpp \