console: remove prepending backslashes

This is a leftover from Quake, where the console and chat were
in fact same entity. Because Xash splits it, there is no need
in prepending backslashes to separate commands from chat messages

engine/client/console.c

@@ -1812,16 +1812,6 @@ void Key_Console( int key )
 	// enter finishes the line
 	if( key == K_ENTER || key == K_KP_ENTER )
 	{
-		// if not in the game explicitly prepent a slash if needed
-		if( cls.state != ca_active && con.input.buffer[0] != '\\' && con.input.buffer[0] != '/' )
-		{
-			char	temp[MAX_SYSPATH];
-
-			Q_strncpy( temp, con.input.buffer, sizeof( temp ));
-			Q_sprintf( con.input.buffer, "\\%s", temp );
-			con.input.cursor++;
-		}
-
 		// backslash text are commands, else chat
 		if( con.input.buffer[0] == '\\' || con.input.buffer[0] == '/' )
 			Cbuf_AddText( con.input.buffer + 1 ); // skip backslash