Simpler setuptools_scm and setuptools_conda usage

Author: rpanderson

setup.cfg

@@ -41,5 +41,3 @@ setup_requires =
 
 [dist_conda]
 pythons = 3.6, 3.7, 3.8
-platforms = linux-64,win-32,win-64,osx-64
-force_conversion = True

setup.py

@@ -8,27 +8,12 @@
 except ImportError:
     CMDCLASS = {}
 
-if "CONDA_BUILD" not in os.environ:
-    dist = Distribution()
-    dist.parse_config_files()
-    INSTALL_REQUIRES = dist.install_requires
-else:
-    INSTALL_REQUIRES = []
-
-VERSION_SCHEME = {}
-VERSION_SCHEME["version_scheme"] = os.environ.get(
-    "SCM_VERSION_SCHEME", "guess-next-dev"
-)
-VERSION_SCHEME["local_scheme"] = os.environ.get("SCM_LOCAL_SCHEME", "node-and-date")
-
-VERSION_SCHEME = {}
-VERSION_SCHEME["version_scheme"] = os.environ.get(
-    "SCM_VERSION_SCHEME", "release-branch-semver"
-)
-VERSION_SCHEME["local_scheme"] = os.environ.get("SCM_LOCAL_SCHEME", "node-and-date")
+VERSION_SCHEME = {
+    "version_scheme": os.getenv("SCM_VERSION_SCHEME", "guess-next-dev"),
+    "local_scheme": os.getenv("SCM_LOCAL_SCHEME", "node-and-date"),
+}
 
 setup(
     use_scm_version=VERSION_SCHEME,
     cmdclass=CMDCLASS,
-    install_requires=INSTALL_REQUIRES
 )