ci: build Python docs with Nix

scripts/README.md

@@ -37,8 +37,6 @@ and an own build machine.
 
 - `android-rpc-server.sh` compiles binaries of `deltachat-rpc-server` using Android NDK.
 
-- `build-python-docs.sh` builds Python documentation into `dist/html/`.
-
 ## Triggering runs on the build machine locally (fast!)
 
 There is experimental support for triggering a remote Python or Rust test run 

scripts/build-python-docs.sh

@@ -1,12 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-export DCC_RS_TARGET=debug
-export DCC_RS_DEV="$PWD"
-cargo build -p deltachat_ffi --features jsonrpc
-
-python3 -m venv venv
-venv/bin/pip install ./python
-venv/bin/pip install ./deltachat-rpc-client
-venv/bin/pip install sphinx breathe sphinx_rtd_theme
-venv/bin/sphinx-build -b html -a python/doc/ dist/html