Remove unnecessary code

This change was actually unnesarry as with the new regex we iterate
over all possible combinations of package and modules.

Cython/Utils.py

@@ -168,13 +168,6 @@ def search_include_directories(dirs, qualified_name, suffix, pos,
                                     package_filename)
                 if path_exists(path):
                     return path
-                inits = {"__init__.py", "__init__.pyx", "__init__.pxd"} - {package_filename}
-                paths = [os.path.join(dir, package_dir, module_name,
-                                    init_filename) for init_filename in inits] 
-                if any(path_exists(p) for p in paths):
-                    path = os.path.join(dir, package_dir, module_name, 'sub.pxd')
-                    if path_exists(path):
-                        return path
     return None