Attempt to fix documentation build.

docs/Dockerfile

@@ -1,7 +1,7 @@
 FROM docker.io/alpine:3.20.1 AS borgmatic
 
 COPY . /app
-RUN apk add --no-cache py3-pip py3-requests py3-ruamel.yaml py3-ruamel.yaml.clib
+RUN apk add --no-cache py3-pip py3-ruamel.yaml py3-ruamel.yaml.clib
 RUN pip install --break-system-packages --no-cache /app && generate-borgmatic-config && chmod +r /etc/borgmatic/config.yaml
 RUN borgmatic --help > /command-line.txt \
     && for action in rcreate transfer create prune compact check delete extract config "config bootstrap" "config generate" "config validate" export-tar mount umount rdelete restore rlist list rinfo info break-lock borg; do \