diff --git a/toolchain/toolchain-external/Config.in b/toolchain/toolchain-external/Config.in
index c1c159cb8e..cb678b7886 100644
--- a/toolchain/toolchain-external/Config.in
+++ b/toolchain/toolchain-external/Config.in
@@ -33,9 +33,6 @@ source "toolchain/toolchain-external/toolchain-external-codesourcery-mips/Config
 source "toolchain/toolchain-external/toolchain-external-codescape-img-mips/Config.in"
 source "toolchain/toolchain-external/toolchain-external-codescape-mti-mips/Config.in"
 
-# NIOSII
-source "toolchain/toolchain-external/toolchain-external-codesourcery-niosII/Config.in"
-
 # Bootlin toolchains, available for virtually all architectures
 source "toolchain/toolchain-external/toolchain-external-bootlin/Config.in"
 
@@ -137,9 +134,6 @@ source "toolchain/toolchain-external/toolchain-external-codesourcery-mips/Config
 source "toolchain/toolchain-external/toolchain-external-codescape-img-mips/Config.in.options"
 source "toolchain/toolchain-external/toolchain-external-codescape-mti-mips/Config.in.options"
 
-# NIOSII
-source "toolchain/toolchain-external/toolchain-external-codesourcery-niosII/Config.in.options"
-
 # Bootlin toolchains
 source "toolchain/toolchain-external/toolchain-external-bootlin/Config.in.options"
 
diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
index ddf1d70ab4..aa5365b5bd 100644
--- a/toolchain/toolchain-external/pkg-toolchain-external.mk
+++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
@@ -13,7 +13,7 @@
 #  * Toolchains provided by Linaro for the ARM and AArch64
 #    architectures
 #  * Sourcery CodeBench toolchains (from Mentor Graphics) for the ARM,
-#    MIPS, PowerPC, x86_64 and NIOS 2 architectures. For the MIPS
+#    MIPS, PowerPC, and x86_64 architectures. For the MIPS
 #    toolchain, the -muclibc variant isn't supported yet, only the
 #    default glibc-based variant is.
 #  * Synopsys DesignWare toolchains for ARC cores
diff --git a/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/Config.in b/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/Config.in
deleted file mode 100644
index cf3ce69a68..0000000000
--- a/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/Config.in
+++ /dev/null
@@ -1,16 +0,0 @@
-config BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII
-	bool "Sourcery CodeBench Nios-II 2018.05"
-	depends on BR2_nios2
-	depends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_8
-	depends on BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "x86"
-	select BR2_TOOLCHAIN_EXTERNAL_GLIBC
-	select BR2_TOOLCHAIN_HAS_SSP
-	select BR2_TOOLCHAIN_HAS_NATIVE_RPC
-	select BR2_INSTALL_LIBSTDCPP
-	select BR2_HOSTARCH_NEEDS_IA32_LIBS
-	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15
-	select BR2_TOOLCHAIN_GCC_AT_LEAST_7
-	help
-	  Sourcery CodeBench toolchain for the Nios-II architecture,
-	  from Mentor Graphics. It uses gcc 7.3, binutils 2.28,
-	  glibc 2.27, gdb 8.0.1 and kernel headers 4.15.5.
diff --git a/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/Config.in.options b/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/Config.in.options
deleted file mode 100644
index 07cc5ede94..0000000000
--- a/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/Config.in.options
+++ /dev/null
@@ -1,9 +0,0 @@
-if BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII
-
-config BR2_TOOLCHAIN_EXTERNAL_PREFIX
-	default "nios2-linux-gnu"
-
-config BR2_PACKAGE_PROVIDES_TOOLCHAIN_EXTERNAL
-	default "toolchain-external-codesourcery-niosII"
-
-endif
diff --git a/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/toolchain-external-codesourcery-niosII.hash b/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/toolchain-external-codesourcery-niosII.hash
deleted file mode 100644
index 47893ab7e2..0000000000
--- a/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/toolchain-external-codesourcery-niosII.hash
+++ /dev/null
@@ -1,6 +0,0 @@
-# From https://sourcery.mentor.com/GNUToolchain/release3374
-md5  4f536b3b9b4e00f483e82e304c0a27ae  sourceryg++-2018.05-5-nios2-linux-gnu-i686-pc-linux-gnu.tar.bz2
-md5  be42ab83da2e8db7b73dc890c2549570  sourceryg++-2018.05-5-nios2-linux-gnu.src.tar.bz2
-# Locally calculated
-sha256  c19afb432b5b23f8d5d639831d3a423a3ea3c9cc62e0015020d20ea2eb36dd1b  sourceryg++-2018.05-5-nios2-linux-gnu-i686-pc-linux-gnu.tar.bz2
-sha256  d73a6364106dd62352711f932d3be8e97fdaaa548995678b5d38d9f21e22437a  sourceryg++-2018.05-5-nios2-linux-gnu.src.tar.bz2
diff --git a/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/toolchain-external-codesourcery-niosII.mk b/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/toolchain-external-codesourcery-niosII.mk
deleted file mode 100644
index cb0fe760ff..0000000000
--- a/toolchain/toolchain-external/toolchain-external-codesourcery-niosII/toolchain-external-codesourcery-niosII.mk
+++ /dev/null
@@ -1,13 +0,0 @@
-################################################################################
-#
-# toolchain-external-codesourcery-niosII
-#
-################################################################################
-
-TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII_VERSION = 2018.05-5
-
-TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII_SITE = https://sourcery.mentor.com/public/gnu_toolchain/$(TOOLCHAIN_EXTERNAL_PREFIX)
-TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII_SOURCE = sourceryg++-$(TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII_VERSION)-$(TOOLCHAIN_EXTERNAL_PREFIX)-i686-pc-linux-gnu.tar.bz2
-TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII_ACTUAL_SOURCE_TARBALL = sourceryg++-$(TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII_VERSION)-$(TOOLCHAIN_EXTERNAL_PREFIX).src.tar.bz2
-
-$(eval $(toolchain-external-package))
