Remove unnecessary input win redisplay

The redisplay function in keyboard handling event was introduced by @rodarima
in the following commit:
7eac636fc8

At the point first commit introduction it made sense, but later
the following commit added proper handling of input redisplay.
ccede06a65

This change was overlooked by me and introduced in #1943.

Potential solution for #1947.

src/ui/inputwin.c

@@ -181,10 +181,6 @@ _inp_callback(GIOChannel* source, GIOCondition condition, gpointer data)
     }
 
     ui_reset_idle_time();
-    if (!get_password) {
-        // Update the input buffer on screen
-        _inp_write(rl_line_buffer, rl_point);
-    }
 
     if (inp_line) {
         ProfWin* window = wins_get_current();