Remove dummy 'os.get_terminal_size'.

Author: fangerer

graalpython/lib-graalpython/posix.py

@@ -133,12 +133,6 @@ def WSTOPSIG(status):
 def uname():
     return uname_result(old_uname())
 
-@__builtin__
-def get_terminal_size(fd):
-    raise OSError
-
-terminal_size = make_named_tuple_class("os.terminal_size", ["columns", "lines"])
-
 error = OSError
 
 terminal_size = make_named_tuple_class("os.terminal_size", ["columns", "lines"])