diff --git a/tools/kerneldoc/subsys/Doxyfile-dev_ctau b/tools/kerneldoc/subsys/Doxyfile-dev_ctau
deleted file mode 100644
index 04e1ccb91e39..000000000000
--- a/tools/kerneldoc/subsys/Doxyfile-dev_ctau
+++ /dev/null
@@ -1,21 +0,0 @@
-# Doxyfile 1.5.2
-
-# $FreeBSD$
-
-#---------------------------------------------------------------------------
-# Project related configuration options
-#---------------------------------------------------------------------------
-PROJECT_NAME           = "FreeBSD kernel CTAU device code"
-OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/dev_ctau/
-EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
-#---------------------------------------------------------------------------
-# configuration options related to the input files
-#---------------------------------------------------------------------------
-INPUT                  = $(DOXYGEN_SRC_PATH)/dev/ctau/ \
-                         $(NOTREVIEWED)
-
-GENERATE_TAGFILE       = dev_ctau/dev_ctau.tag
-
-@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
-@INCLUDE               = common-Doxyfile
-
diff --git a/tools/kerneldoc/subsys/Doxyfile-dev_cx b/tools/kerneldoc/subsys/Doxyfile-dev_cx
deleted file mode 100644
index 4912b305f713..000000000000
--- a/tools/kerneldoc/subsys/Doxyfile-dev_cx
+++ /dev/null
@@ -1,21 +0,0 @@
-# Doxyfile 1.5.2
-
-# $FreeBSD$
-
-#---------------------------------------------------------------------------
-# Project related configuration options
-#---------------------------------------------------------------------------
-PROJECT_NAME           = "FreeBSD kernel CX device code"
-OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/dev_cx/
-EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
-#---------------------------------------------------------------------------
-# configuration options related to the input files
-#---------------------------------------------------------------------------
-INPUT                  = $(DOXYGEN_SRC_PATH)/dev/cx/ \
-                         $(NOTREVIEWED)
-
-GENERATE_TAGFILE       = dev_cx/dev_cx.tag
-
-@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
-@INCLUDE               = common-Doxyfile
-