Update to swh-py-template v0.1.5

- remove sphinx-dev tox env,
- use non-editable install of swh-docs to build the sphinx doc in tox,
- remove (now useless) MANIFEST.in.

.copier-answers.yml

 # Changes here will be overwritten by Copier
-_commit: v0.1.4
+_commit: v0.1.5
 _src_path: https://gitlab.softwareheritage.org/swh/devel/swh-py-template.git
 description: Software Heritage core utilities
 distribution_name: swh-core

MANIFEST.in

-include Makefile
-include conftest.py
-include requirements*.txt
-include version.txt
-recursive-include swh/core/db/sql *.sql
-recursive-include swh py.typed
-recursive-include swh/core/db/tests/data/ *
-recursive-include swh/core/tests/data/ *
-recursive-include swh/core/tests/fixture/data/ *

docs/Makefile

-include ../../swh-docs/Makefile.sphinx
+include swh-docs/Makefile.sphinx

tox.ini

@@ -75,31 +75,11 @@ extras =
   http
   github
 deps =
-  # fetch and install swh-docs in develop mode
-  -e git+https://gitlab.softwareheritage.org/swh/devel/swh-docs.git\#egg=swh.docs
+  # fetch and install swh-docs
+  git+https://gitlab.softwareheritage.org/swh/devel/swh-docs.git\#egg=swh.docs
 setenv =
   SWH_PACKAGE_DOC_TOX_BUILD = 1
   # turn warnings into errors
   SPHINXOPTS = -W
 commands =
-  make -I ../.tox/sphinx/src/swh-docs/swh/ -C docs
-
-# build documentation only inside swh-environment using local state
-# of swh-docs package
-[testenv:sphinx-dev]
-allowlist_externals = make
-extras =
-  testing-core
-  logging
-  db
-  http
-  github
-deps =
-  # install swh-docs in develop mode
-  -e ../swh-docs
-setenv =
-  SWH_PACKAGE_DOC_TOX_BUILD = 1
-  # turn warnings into errors
-  SPHINXOPTS = -W
-commands =
-  make -I ../.tox/sphinx-dev/src/swh-docs/swh/ -C docs
+  make -I {env_dir}/share/ -C docs