diff --git a/Kconfig.zephyr b/Kconfig.zephyr
index ea89bafa29e..45b52acaf6e 100644
--- a/Kconfig.zephyr
+++ b/Kconfig.zephyr
@@ -28,12 +28,6 @@ source "ext/Kconfig"
 
 source "tests/Kconfig"
 
-config PROJECT_BASE
-	string
-	option env="PROJECT_BASE"
-
-source "$PROJECT_BASE/Kconfig"
-
 #
 # The following are for Kconfig files for default values only.
 # These should be parsed at the end.
diff --git a/samples/application_development/app_kconfig/Kconfig b/samples/application_development/app_kconfig/Kconfig
deleted file mode 100644
index beb2eb8a796..00000000000
--- a/samples/application_development/app_kconfig/Kconfig
+++ /dev/null
@@ -1,5 +0,0 @@
-menu "APPLICATION CONFIGURATION"
-
-source "$PROJECT_BASE/src/Kconfig"
-
-endmenu
diff --git a/samples/application_development/app_kconfig/Makefile b/samples/application_development/app_kconfig/Makefile
deleted file mode 100644
index e70a750a88d..00000000000
--- a/samples/application_development/app_kconfig/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-BOARD ?= qemu_x86
-CONF_FILE = prj.conf
-
-include ${ZEPHYR_BASE}/Makefile.test
diff --git a/samples/application_development/app_kconfig/prj.conf b/samples/application_development/app_kconfig/prj.conf
deleted file mode 100644
index b2a4ba59104..00000000000
--- a/samples/application_development/app_kconfig/prj.conf
+++ /dev/null
@@ -1 +0,0 @@
-# nothing here
diff --git a/samples/application_development/app_kconfig/src/Kconfig b/samples/application_development/app_kconfig/src/Kconfig
deleted file mode 100644
index d5b0443c94b..00000000000
--- a/samples/application_development/app_kconfig/src/Kconfig
+++ /dev/null
@@ -1,6 +0,0 @@
-config MERGE_PATCH
-	bool "Merge patch"
-	default y
-	help
-	Will this patch, supporting application
-	Kconfig configuration, be merged?
diff --git a/samples/application_development/app_kconfig/src/Makefile b/samples/application_development/app_kconfig/src/Makefile
deleted file mode 100644
index 00066e15678..00000000000
--- a/samples/application_development/app_kconfig/src/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-y = main.o
diff --git a/samples/application_development/app_kconfig/src/main.c b/samples/application_development/app_kconfig/src/main.c
deleted file mode 100644
index 8a2ceedcd34..00000000000
--- a/samples/application_development/app_kconfig/src/main.c
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include <zephyr.h>
-#include <misc/printk.h>
-
-void main(void)
-{
-#if defined(CONFIG_MERGE_PATCH)
-	printk("This patch will be merged!\n");
-#else
-	printk("This patch will not be merged!\n");
-#endif
-}
diff --git a/samples/application_development/app_kconfig/testcase.ini b/samples/application_development/app_kconfig/testcase.ini
deleted file mode 100644
index c3d0fa6f664..00000000000
--- a/samples/application_development/app_kconfig/testcase.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[test]
-tags = appdev
-build_only = true
-platform_whitelist = qemu_x86