Move the last of the metadata to setup.cfg

setup.py

@@ -1,41 +1,3 @@
-import ast
-import os.path
-
 from setuptools import setup
 
-
-def extract_value(v):
-    if isinstance(v, ast.Str):
-        return v.s
-    elif isinstance(v, ast.Num):
-        return v.n
-    elif isinstance(v, ast.Call):
-        for a in v.args:
-            r = extract_value(a)
-            if r is not None:
-                return r
-
-
-def extract_vars_from_python_ast(a):
-    res = {}
-    for e in a.body:
-        if isinstance(e, ast.Assign) and len(e.targets) == 1:
-            n = e.targets[0]
-            if isinstance(n, ast.Name):
-                res[n.id] = extract_value(e.value)
-    return res
-
-
-def extract_vars_from_python_source(p):
-    with open(p) as f:
-        t = f.read()
-    return extract_vars_from_python_ast(ast.parse(t))
-
-
-this_dir = os.path.dirname(os.path.abspath(__file__))
-author_info = extract_vars_from_python_source(os.path.join(this_dir, "pgpy", "_author.py"))
-setup(
-    version=author_info["__version__"],
-    author=author_info["__author__"],
-    license=author_info["__license__"],
-)
+setup()