remove __name__ in setup.py

Author: zhengp0

setup.py

@@ -2,8 +2,7 @@
 from Cython.Build import cythonize
 from setuptools import setup
 
-if __name__ == "__main__":
-    setup(
-        ext_modules=cythonize("src/spmat/linalg.pyx"),
-        include_dirs=[numpy.get_include()],
-    )
+setup(
+    ext_modules=cythonize("src/spmat/linalg.pyx"),
+    include_dirs=[numpy.get_include()],
+)