Do not replace ascii with UTF-8 in powerline-daemon and python client

Assuming ascii was expected to be used when LANG=C it did not work in any case:
in this case preferred encoding is “ANSI_X3.4-1968”. Same for
`sys.getfilesystemencoding()`.

client/powerline.py

@@ -45,8 +45,6 @@ except Exception:
 	os.execvp('powerline-render', args)
 
 fenc = sys.getfilesystemencoding() or 'utf-8'
-if fenc == 'ascii':
-	fenc = 'utf-8'
 
 tobytes = lambda s: s if isinstance(s, bytes) else s.encode(fenc)
 

scripts/powerline-daemon

@@ -143,8 +143,6 @@ def do_write(conn, result):
 
 
 encoding = getpreferredencoding() or 'UTF-8'
-if encoding.lower() == 'ascii':
-	encoding = 'UTF-8'
 
 
 def safe_bytes(o, encoding=encoding):