diff --git a/config.h.cmake b/config.h.cmake
index e6878ecbb..e2cec4c69 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -20,9 +20,6 @@
 /* Define to 1 if you have the <locale.h> header file. */
 #cmakedefine HAVE_LOCALE_H 1
 
-/* Define to 1 if your stdlib has std::make_unique */
-#cmakedefine HAVE_MAKE_UNIQUE 1
-
 /* Define to 1 if you have the <poll.h> header file. */
 #cmakedefine HAVE_POLL_H 1
 
@@ -62,9 +59,6 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #cmakedefine HAVE_UNISTD_H 1
 
-/* Define to 1 if your compiler supports variadic templates */
-#cmakedefine HAVE_VARIADIC_TEMPLATES 1
-
 /* Define to 1 if you have the `vasprintf' function. */
 #cmakedefine HAVE_VASPRINTF 1