Revert "Merge #16367: Multiprocess build support"

This reverts the changes made in merge commit
1b30761360:

This reverts commit b919efadff.
This reverts commit d54f64c6c7.
This reverts commit 787f40668d.
This reverts commit d630646662.
This reverts commit e6e44eedd5.

depends/packages/native_libmultiprocess.mk

@@ -1,18 +0,0 @@
-package=native_libmultiprocess
-$(package)_version=1d630f536d43d1fdba028f2cfccf49bc27da92db
-$(package)_download_path=https://github.com/chaincodelabs/libmultiprocess/archive
-$(package)_file_name=$($(package)_version).tar.gz
-$(package)_sha256_hash=f43183ccf59fa7596d113e56518563673f5823a721974b4058d8778ef53bd476
-$(package)_dependencies=native_boost native_capnp
-
-define $(package)_config_cmds
-  cmake -DCMAKE_INSTALL_PREFIX=$($($(package)_type)_prefix)
-endef
-
-define $(package)_build_cmds
-  $(MAKE)
-endef
-
-define $(package)_stage_cmds
-  $(MAKE) DESTDIR=$($(package)_staging_dir) install
-endef