fix: remove uv cache mounts

Cache mounts are no longer needed since build-utils now sets
UV_NO_CACHE=1 and UV_PYTHON_DOWNLOADS=never.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Mohammed Naser <mnaser@vexxhost.com>

Author: mnaser

Dockerfile

@@ -7,6 +7,4 @@ FROM ${FROM}
 ENV PATH=/var/lib/openstack/bin:$PATH
 RUN --mount=type=bind,source=bindep.txt,target=/bindep.txt \
     --mount=type=bind,from=ghcr.io/vexxhost/build-utils:latest,source=/bin,target=/build \
-    --mount=type=cache,target=/root/.cache/uv \
-    --mount=type=cache,target=/root/.local/share/uv \
     /build/install-bindep-packages