tests: removed POSIX testing (fixes #163)

tests/README

@@ -1,24 +1,13 @@
-The testing suite contains two trees: the Bonsai tree and the POSIX tree:
+Tests
+=====
 
-.
-├── README
-├── bonsai/
-│   ├── dj.mk
-│   ├── false.mk
-│   ├── fop.mk
-│   └── ...
-├── posix/
-└── tests.mk
+The Harakit testing suite verifies the functionality of Harakit utilities
+and checks for regressions and other issues relating to compliance to our
+standards of practice.
 
-The Bonsai tree tests the functionality of Harakit utilities for regressions and
-other issues relating to compliance to our standards of practice.
-
-The POSIX tests are currently a work-in-progress. Their status in this
-repository is uncertain.
-
-Both sets of tests also inherit the environment set by the top-level Makefile,
-which sets the BIN variable to the build/bin directory at the root of the
-project; therefore, each binary is located at $(BIN)/tool for idiomatic access.
+Tests inherit the environment set by the top-level Makefile, which sets the BIN
+variable to the build/bin directory at the root of the project; therefore, each
+binary is located at $(BIN)/tool for idiomatic access.
 
 Each test contains a set of PHONY targets which are prefixed with the name of
 the tool being tested and an underscore. The first target is tests, which
@@ -27,10 +16,10 @@ included in the top Makefile, so they can be called from the root of the
 repository. This also means that BIN can be set manually so that tests can be
 run using make(1) inside of the tests directory:
 
-	$ make -f tests.mk BIN=../build/bin dj_tests
+	$ make -f dj.mk BIN=../build/bin dj_tests
 
 --
-Copyright © 2024 Emma Tebibyte <emma@tebibyte.media>
+Copyright © 2024–2025 Emma Tebibyte <emma@tebibyte.media>
 
 This work is licensed under CC BY-SA 4.0. To view a copy of this license, visit
 <http://creativecommons.org/licenses/by-sa/4.0/>.