Stop generating unused headers.

These just cause confusion because they often have different
values/layouts, but they're never actually used.

Test: treehugger
Change-Id: I424034088e017c919f62fcefa7d6d3f903f31cfb
diff --git a/libc/kernel/tools/generate_uapi_headers.sh b/libc/kernel/tools/generate_uapi_headers.sh
index 61c78ce..088c12e 100755
--- a/libc/kernel/tools/generate_uapi_headers.sh
+++ b/libc/kernel/tools/generate_uapi_headers.sh
@@ -43,7 +43,7 @@
 ANDROID_KERNEL_BRANCH="android-mainline"
 KERNEL_DIR=""
 KERNEL_DOWNLOAD=0
-ARCH_LIST=("arm" "arm64" "mips" "x86")
+ARCH_LIST=("arm" "arm64" "x86")
 ANDROID_KERNEL_DIR="external/kernel-headers/original"
 SKIP_GENERATION=0
 VERIFY_HEADERS_ONLY=0