checked in: [RFT/RFA/MinGW] remove some extraneous changes in readline/terminal.c

[Joel Brobecker]

> readline/ChangeLog.gdb:
> 
>         * terminal.c: Remove duplicate includes of windows.h and
>         wincon.h.
>         (_rl_get_screen_size): Remove redundant code for MinGW getting
>         the console size from the Windows API.

Checked in.

-- 
Joel