Use setup.py instead of Pipfile for packaging

See pypa/pipenv#1263

setup.py

@@ -5,26 +5,15 @@
 source_root = os.path.dirname(os.path.abspath(__file__))
 
 
-def read_requirements_as_package_names():
-    """
-    Get dependencies listed in a given requirements file.
-    1. Packages in 'requirements.txt' are excluded
-    2. Lines in `pipenv-requirements.txt` may be empty or starting with '#';
-       they should be skipped.
-    3. Lines may have post-comment, so they should be spilt by spaces
-       and get the first part.
-    """
-    requirements_path = os.path.join(source_root, "pipenv-requirements.txt")
-    with open(requirements_path, "r") as f:
-        stripped_lines = (line.strip() for line in f)
-        valid_lines = (
-            line for line in stripped_lines
-            if line and not line.startswith("#") and not line.startswith("-r")
-        )
-        valid_package_names = [
-            line.split()[0].replace(";", "") for line in valid_lines
-        ]
-        return valid_package_names
+required_dev = [
+    'pytest',
+    'pytest-runner',
+    "coverage",
+    "pytest-cov",
+    "flake8",
+    "pytest-flake8",
+    "tox"
+]
 
 
 setup(
@@ -35,13 +24,15 @@ def read_requirements_as_package_names():
     long_description=open(os.path.join(source_root, "README.md")).read(),
     license="UNLICENSE",
     url="https://github.com/iCHEF/queryfilter",
-    install_requires=read_requirements_as_package_names(),
     tests_require=['pipenv'],  # Use pipenv install --dev
     packages=find_packages(str(source_root)),
     package_data={
         "": ["*.pyi", "*.md"],
     },
     setup_requires=["pytest-runner"],
+    extras_require={
+        'dev': required_dev
+    },
     classifiers=[
         "iCHEF :: Private",
         "Development Status :: 1 - Planning",