c_edf.edfopen_file_writeonly now supports utf-8

pyedflib/_extensions/_pyedflib.pyx

@@ -519,23 +519,6 @@ def set_physical_maximum(handle, edfsignal, phys_max):
 def open_file_writeonly(path, filetype, number_of_signals):
     """int edfopen_file_writeonly(char *path, int filetype, int number_of_signals)"""
 
-    if os.name=='nt' and contains_unicode(path):
-        default_enc = locale.getdefaultlocale()[1]
-        if default_enc is None:
-            default_enc = ''
-        else:
-            default_enc = default_enc.lower()
-        using_unicode = 'utf' in default_enc or 'unicode' in default_enc or \
-                        '10646' in  default_enc or default_enc=='cp65001'
-        # Check if we're on Windows and the file path contains Unicode.
-        # If so, use workaround to create file: In Python, create the file,
-        # then look up and pass the short file name to the C library
-        if not using_unicode:
-            warnings.warn('Attempting to write Unicode file {} on Windows. ' \
-                          'Consider changing your locale to UTF8.'.format(path))
-            with open(path, 'wb'): pass
-            path = get_short_path_name(path)
-
     py_byte_string  = path.encode('utf_8','strict')
     cdef char* path_str = py_byte_string
     return c_edf.edfopen_file_writeonly(path_str, filetype, number_of_signals)