configs: Remove obsolete patches-arc64 references

This commit removes any references to the obsolete `patches-arc64`
patch directory, which was removed in the commit
31aba21.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>

Author: stephanosio

.github/workflows/ci.yml

@@ -638,7 +638,6 @@ jobs:
         # Set environment configuration
         cat <<EOF >> .config
         CT_LOCAL_TARBALLS_DIR="${WORKSPACE}/sources"
-        CT_LOCAL_PATCH_DIR="${GITHUB_WORKSPACE}/patches-arc64"
         CT_OVERLAY_LOCATION="${GITHUB_WORKSPACE}/overlays"
         EOF
 

configs/arc64-zephyr-elf.config

@@ -1,7 +1,5 @@
 CT_CONFIG_VERSION="3"
 CT_EXPERIMENTAL=y
-CT_PATCH_BUNDLED_LOCAL=y
-CT_LOCAL_PATCH_DIR="${CT_TOP_DIR}/../../patches-arc64"
 CT_ARCH_ARC=y
 CT_ARCH_64=y
 CT_TARGET_VENDOR="zephyr"