Simplify requirements

{{cookiecutter.project_slug}}/requirements-dev.txt → {{cookiecutter.project_slug}}/requirements/dev.txt

+black
 matplotlib
 memory_profiler
 numpydoc
@@ -12,5 +13,4 @@ sphinx-autoapi
 sphinx-gallery>=0.1.12
 sphinx_rtd_theme
 sphinxcontrib-versioning
-yapf>=0.30.0
 wheel

{{cookiecutter.project_slug}}/setup.py

@@ -8,10 +8,10 @@ from setuptools import setup
 import sys
 
 
-def read_stripped_lines(filename):
+def read_requirements(kind):
     """Return a list of stripped lines from a file"""
-    with open(filename) as fobj:
-        return [l.strip() for l in fobj.readlines()]
+    with open(os.path.join("requirements", kind + ".txt")) as fobj:
+        return = [l.strip() for l in fobj.readlines()]
 
 
 try:
@@ -33,8 +33,8 @@ setup(
     setup_requires=['setuptools_scm'],
     use_scm_version=True,
     python_requires='>=3.5',
-    install_requires=read_stripped_lines("requirements.txt"),
-    extras_require={"dev": read_stripped_lines("requirements-dev.txt")},
+    install_requires=read_requirements("install"),
+    extras_require={kind: read_requirements(kind) for kind in ["dev"]},
     classifiers=[
         'Intended Audience :: Developers',
         'Intended Audience :: Science/Research',