diff --git a/build.config.aarch64 b/build.config.aarch64
index 50523ac0774c..df8f76ab272c 100644
--- a/build.config.aarch64
+++ b/build.config.aarch64
@@ -1,10 +1,6 @@
 ARCH=arm64
-
 LLVM_IAS=1
 CROSS_COMPILE=aarch64-linux-gnu-
-CROSS_COMPILE_COMPAT=arm-linux-gnueabi-
-LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gas/linux-x86
-LINUX_GCC_CROSS_COMPILE_COMPAT_PREBUILTS_BIN=prebuilts/gas/linux-x86
 
 FILES="
 arch/arm64/boot/Image.gz
diff --git a/build.config.arm b/build.config.arm
index 480f80079b98..dce13076dfcb 100644
--- a/build.config.arm
+++ b/build.config.arm
@@ -1,8 +1,6 @@
 ARCH=arm
-
 LLVM_IAS=1
 CROSS_COMPILE=arm-linux-gnueabi-
-LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gas/linux-x86
 
 FILES="
 arch/arm/boot/Image.gz
diff --git a/build.config.x86_64 b/build.config.x86_64
index db5ed3a5f977..cfbee0c5f881 100644
--- a/build.config.x86_64
+++ b/build.config.x86_64
@@ -1,8 +1,6 @@
 ARCH=x86_64
-
 LLVM_IAS=1
 CROSS_COMPILE=x86_64-linux-gnu-
-LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gas/linux-x86
 
 FILES="
 arch/x86/boot/bzImage