diff --git a/.gitmodules b/.gitmodules
index dfc7c0768..fd68f304a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,12 +13,6 @@
 [submodule "sources/lib/strings"]
 	path = sources/lib/strings
 	url = https://github.com/dylan-lang/strings.git
-[submodule "sources/lib/logging"]
-	path = sources/lib/logging
-	url = https://github.com/dylan-lang/logging.git
-[submodule "sources/lib/hash-algorithms"]
-	path = sources/lib/hash-algorithms
-	url = https://github.com/dylan-lang/hash-algorithms.git
 [submodule "sources/lib/testworks"]
 	path = sources/lib/testworks
 	url = https://github.com/dylan-lang/testworks.git
diff --git a/Makefile.in b/Makefile.in
index 00cdba31c..6177e1cee 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -373,9 +373,7 @@ TEST_LIBS = \
 	channels-test-suite \
 	variable-search-tests \
 	command-line-parser-test-suite \
-	logging-test-suite \
-	regular-expressions-test-suite \
-	hash-algorithms-test
+	regular-expressions-test-suite
 
 TEST_LOADS = $(shell for lib in $(TEST_LIBS); do echo "--load lib$${lib}.@shrext@ "; done)
 
diff --git a/sources/lib/hash-algorithms b/sources/lib/hash-algorithms
deleted file mode 160000
index 1dfdc590f..000000000
--- a/sources/lib/hash-algorithms
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 1dfdc590f8c38ae63be7f013e94b01cccaa0310d
diff --git a/sources/lib/logging b/sources/lib/logging
deleted file mode 160000
index dbc1c65ed..000000000
--- a/sources/lib/logging
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit dbc1c65ed06362b7c4b77d69231f4a7a12584fc9
diff --git a/sources/registry/generic/hash-algorithms b/sources/registry/generic/hash-algorithms
deleted file mode 100644
index 12e0c3ace..000000000
--- a/sources/registry/generic/hash-algorithms
+++ /dev/null
@@ -1 +0,0 @@
-abstract://dylan/lib/hash-algorithms/hash-algorithms.lid
diff --git a/sources/registry/generic/hash-algorithms-test b/sources/registry/generic/hash-algorithms-test
deleted file mode 100644
index 9aa0eea92..000000000
--- a/sources/registry/generic/hash-algorithms-test
+++ /dev/null
@@ -1 +0,0 @@
-abstract://dylan/lib/hash-algorithms/test/hash-algorithms-test.lid
diff --git a/sources/registry/generic/logging b/sources/registry/generic/logging
deleted file mode 100644
index 2f675e815..000000000
--- a/sources/registry/generic/logging
+++ /dev/null
@@ -1 +0,0 @@
-abstract://dylan/lib/logging/logging.lid
diff --git a/sources/registry/generic/logging-test-suite b/sources/registry/generic/logging-test-suite
deleted file mode 100644
index 524badb3e..000000000
--- a/sources/registry/generic/logging-test-suite
+++ /dev/null
@@ -1 +0,0 @@
-abstract://dylan/lib/logging/tests/logging-test-suite.lid
diff --git a/sources/registry/generic/logging-test-suite-app b/sources/registry/generic/logging-test-suite-app
deleted file mode 100644
index 549d588b3..000000000
--- a/sources/registry/generic/logging-test-suite-app
+++ /dev/null
@@ -1 +0,0 @@
-abstract://dylan/lib/logging/tests/logging-test-suite-app.lid