scripts: remove libcxxabi

BUG=b:235023022
TEST=create new chroot; sys-lib/libcxxabi should be absent

Change-Id: I950c19616d52534d263794b64e083e7a939d7308
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3711625
Reviewed-by: Adrian Dole <adriandole@google.com>
Tested-by: Adrian Dole <adriandole@google.com>
Reviewed-by: Sergey Frolov <sfrolov@google.com>
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Auto-Submit: Adrian Dole <adriandole@google.com>
diff --git a/sdk_lib/make_chroot.sh b/sdk_lib/make_chroot.sh
index f200633..d8f6856 100755
--- a/sdk_lib/make_chroot.sh
+++ b/sdk_lib/make_chroot.sh
@@ -289,7 +289,7 @@
 
 # Next libcxx. This is required due to the migration to LLVM runtime builds.
 early_enter_chroot ${EMERGE_CMD} -uN --nodeps ${USEPKG} \
-  sys-libs/libcxxabi sys-libs/libcxx
+  sys-libs/libcxx
 
 # Now we can let the rest of the compiler packages build in parallel as they
 # don't generally rely on each other.