Move away from poetry

More or less everything is now done by setup.py
Pipfile simply installs the module in editable mode, which
recursively resolves dependencies as defined in setup.py.

pyproject.toml

@@ -1,70 +1,10 @@
 [build-system]
-requires = ["poetry>=0.12"]
-build-backend = "poetry.masonry.api"
+requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta"
 
-[tool.poetry]
-name = "openflexure-microscope-server"
-version = "2.9.3"
-description = "Python module, and Flask-based web API, to run the OpenFlexure Microscope."
 
-authors = [
-    "Joel Collins <j.collins@bath.ac.uk>",
-    "Richard Bowman <r.w.bowman@bath.ac.uk",
-    "Julian Stirling <j.stirling@bath.ac.uk>"
-]
+#exclude = ["**/node_modules/"] # I've tried to put this in the "packages" key but not sure it works.
 
-readme = 'README.md'
-
-repository = "https://gitlab.com/openflexure/openflexure-microscope-server"
-homepage = "https://www.openflexure.org"
-
-keywords = ['raspberry pi', 'arduino', 'microscope']
-
-license = "GPL-3.0"
-
-exclude = ["**/node_modules/"]
-
-packages = [
-    { include = "openflexure_microscope" },
-]
-
-[tool.poetry.dependencies]
-python = "^3.7.3"
-Flask = "^1.0"
-numpy = "1.19.2" # Exact version so we can guarantee a wheel
-Pillow = "^7.2.0"
-scipy = "1.5.3" # Exact version so we can guarantee a wheel
-"RPi.GPIO" = { version = "^0.7.0", optional = true }
-python-dateutil = "^2.8"
-psutil = "^5.6.7" # Autostorage extension
-opencv-python-headless = "4.4.0.44"
-sangaboard = "^0.2"
-expiringdict = "^1.2.1"
-camera-stage-mapping = "0.1.4"
-picamerax = ">=20.9.1"
-pyyaml = "^5.3.1"
-pytest-cov = "^2.10.1"
-piexif = "^1.1.3"
-labthings = "^1.2.2"
-typing-extensions = "^3.7.4"  # Needed for some type-hints in Python < 3.8 (e.g. Literal)
-numpy-stubs = {git = "https://github.com/numpy/numpy-stubs.git"}  # Needed for Numpy < 1.20
-
-[tool.poetry.extras]
-rpi = ["RPi.GPIO"]
-
-[tool.poetry.scripts]
-rescue = 'openflexure_microscope.rescue.auto:main'
-
-[tool.poetry.dev-dependencies]
-sphinxcontrib-httpdomain = "^1.7"
-rope = "^0.14.0"
-pylint = "^2.3"
-black = {version = "^18.3-alpha.0",allow-prereleases = true}
-pytest = "^6.1.2"
-mypy = "^0.790"
-poethepoet = "^0.9.0"
-freezegun = "^1.0.0"
-lxml = "^4.6.2"
 
 [tool.black]
 exclude = '(\.eggs|\.git|\.venv|\venv|node_modules/)'