diff --git a/.gitmodules b/.gitmodules
index a6d0dd9b293cc941368e3c96127b43758de47da3..067f871c879488ce273a9cf3a2d508aca7c4e47b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
 [submodule "packages/rbm"]
 	path = packages/rbm
 	url = https://github.com/boklm/rbm
-[submodule "tools/prune-old-builds"]
-	path = tools/prune-old-builds
-	url = https://github.com/boklm/prune-old-builds
diff --git a/tools/prune-old-builds b/tools/prune-old-builds
deleted file mode 160000
index 8cb752270ef0c1d82a07196c5fc5024f042d7885..0000000000000000000000000000000000000000
--- a/tools/prune-old-builds
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 8cb752270ef0c1d82a07196c5fc5024f042d7885