Merge bitcoin/bitcoin#24385: build: remove boost dep from libmultiprocess

07dcf1a76e build: remove boost dep from libmultiprocess (fanquake)

Pull request description:

  Looks like this hasn't been needed since https://github.com/chaincodelabs/libmultiprocess/pull/25 and was just missed in #19160.

ACKs for top commit:
  ryanofsky:
    Code review ACK 07dcf1a76e. Should probably wait for GUIX build results, but I think this should be fine
  hebasto:
    ACK 07dcf1a76e

Tree-SHA512: 7988efd4aaf6ad512d60cfd33f350df56090daf88aac3aed2a1d400e80bc723dc27d27f5fa5d75359f9fae60d04b87d4b120d4e79e3079df8631956ab6c3b83c

depends/packages/libmultiprocess.mk

@@ -3,7 +3,7 @@ $(package)_version=$(native_$(package)_version)
 $(package)_download_path=$(native_$(package)_download_path)
 $(package)_file_name=$(native_$(package)_file_name)
 $(package)_sha256_hash=$(native_$(package)_sha256_hash)
-$(package)_dependencies=native_$(package) boost capnp
+$(package)_dependencies=native_$(package) capnp
 
 define $(package)_config_cmds
   $($(package)_cmake)