diff --git a/support/config-fragments/autobuild/br-i386-pentium4-full.config b/support/config-fragments/autobuild/br-i386-pentium4-full.config
deleted file mode 100644
index c680699288..0000000000
--- a/support/config-fragments/autobuild/br-i386-pentium4-full.config
+++ /dev/null
@@ -1,10 +0,0 @@
-BR2_x86_pentium4=y
-BR2_TOOLCHAIN_EXTERNAL=y
-BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
-BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
-BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/br-i386-pentium4-full-2020.11.2.tar.bz2"
-BR2_TOOLCHAIN_EXTERNAL_GCC_9=y
-BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_4=y
-BR2_TOOLCHAIN_EXTERNAL_LOCALE=y
-# BR2_TOOLCHAIN_EXTERNAL_HAS_THREADS_DEBUG is not set
-BR2_TOOLCHAIN_EXTERNAL_CXX=y
diff --git a/support/config-fragments/autobuild/br-microblazeel-full-internal.config b/support/config-fragments/autobuild/br-microblazeel-full-internal.config
deleted file mode 100644
index 0d2d7df8f1..0000000000
--- a/support/config-fragments/autobuild/br-microblazeel-full-internal.config
+++ /dev/null
@@ -1 +0,0 @@
-BR2_microblazeel=y
diff --git a/support/config-fragments/autobuild/br-powerpc-603e-basic-cpp.config b/support/config-fragments/autobuild/br-powerpc-603e-basic-cpp.config
deleted file mode 100644
index 045428c1de..0000000000
--- a/support/config-fragments/autobuild/br-powerpc-603e-basic-cpp.config
+++ /dev/null
@@ -1,10 +0,0 @@
-BR2_powerpc=y
-BR2_powerpc_603e=y
-BR2_TOOLCHAIN_EXTERNAL=y
-BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
-BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
-BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/br-powerpc-603e-basic-cpp-2020.11.2.tar.bz2"
-BR2_TOOLCHAIN_EXTERNAL_GCC_9=y
-BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_9=y
-# BR2_TOOLCHAIN_EXTERNAL_HAS_THREADS_DEBUG is not set
-BR2_TOOLCHAIN_EXTERNAL_CXX=y
diff --git a/support/config-fragments/autobuild/br-powerpc-internal-full.config b/support/config-fragments/autobuild/br-powerpc-internal-full.config
deleted file mode 100644
index 61b3e7a966..0000000000
--- a/support/config-fragments/autobuild/br-powerpc-internal-full.config
+++ /dev/null
@@ -1,4 +0,0 @@
-BR2_powerpc=y
-BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
-BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
-BR2_TOOLCHAIN_BUILDROOT_CXX=y
diff --git a/support/config-fragments/autobuild/br-powerpc64-power7-glibc.config b/support/config-fragments/autobuild/br-powerpc64-power7-glibc.config
deleted file mode 100644
index a80047ea66..0000000000
--- a/support/config-fragments/autobuild/br-powerpc64-power7-glibc.config
+++ /dev/null
@@ -1,9 +0,0 @@
-BR2_powerpc64=y
-BR2_powerpc_power7=y
-BR2_TOOLCHAIN_EXTERNAL=y
-BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
-BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.net/toolchains/tarballs/br-powerpc64-power7-glibc-2020.11.2.tar.bz2"
-BR2_TOOLCHAIN_EXTERNAL_GCC_9=y
-BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_9=y
-BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
-BR2_TOOLCHAIN_EXTERNAL_CXX=y
diff --git a/support/config-fragments/autobuild/br-riscv64-full-internal.config b/support/config-fragments/autobuild/br-riscv64-full-internal.config
deleted file mode 100644
index 5c1dfc47e3..0000000000
--- a/support/config-fragments/autobuild/br-riscv64-full-internal.config
+++ /dev/null
@@ -1,4 +0,0 @@
-BR2_riscv=y
-BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
-BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
-BR2_TOOLCHAIN_BUILDROOT_CXX=y
diff --git a/support/config-fragments/autobuild/br-s390x-z13-internal-glibc.config b/support/config-fragments/autobuild/br-s390x-z13-internal-glibc.config
deleted file mode 100644
index 56af5fb1ba..0000000000
--- a/support/config-fragments/autobuild/br-s390x-z13-internal-glibc.config
+++ /dev/null
@@ -1,4 +0,0 @@
-BR2_s390x=y
-BR2_s390x_z13=y
-BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
-BR2_TOOLCHAIN_BUILDROOT_CXX=y
diff --git a/support/config-fragments/autobuild/br-xtensa-full-internal.config b/support/config-fragments/autobuild/br-xtensa-full-internal.config
deleted file mode 100644
index 89e81d4c45..0000000000
--- a/support/config-fragments/autobuild/br-xtensa-full-internal.config
+++ /dev/null
@@ -1,3 +0,0 @@
-BR2_xtensa=y
-BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
-BR2_TOOLCHAIN_BUILDROOT_CXX=y
diff --git a/support/config-fragments/autobuild/toolchain-configs.csv b/support/config-fragments/autobuild/toolchain-configs.csv
index 5c9fe660d3..ff8927eb37 100644
--- a/support/config-fragments/autobuild/toolchain-configs.csv
+++ b/support/config-fragments/autobuild/toolchain-configs.csv
@@ -45,15 +45,7 @@ support/config-fragments/autobuild/bootlin-xtensa-uclibc.config,x86_64
 support/config-fragments/autobuild/br-arm-basic.config,x86_64
 support/config-fragments/autobuild/br-arm-full-nothread.config,x86_64
 support/config-fragments/autobuild/br-arm-internal-glibc.config,any
-support/config-fragments/autobuild/br-i386-pentium4-full.config,x86_64
 support/config-fragments/autobuild/br-loongarch64-full-internal.config,any
 support/config-fragments/autobuild/br-loongarch64-internal-glibc.config,any
-support/config-fragments/autobuild/br-microblazeel-full-internal.config,any
 support/config-fragments/autobuild/br-mips64-n64-full.config,x86_64
 support/config-fragments/autobuild/br-mips64r6-el-hf-glibc.config,x86_64
-support/config-fragments/autobuild/br-powerpc-603e-basic-cpp.config,x86_64
-support/config-fragments/autobuild/br-powerpc64-power7-glibc.config,x86_64
-support/config-fragments/autobuild/br-powerpc-internal-full.config,any
-support/config-fragments/autobuild/br-riscv64-full-internal.config,any
-support/config-fragments/autobuild/br-s390x-z13-internal-glibc.config,any
-support/config-fragments/autobuild/br-xtensa-full-internal.config,any