Remove experimental Unicode support.

This reverts commit 7f0f43e6f9 and some related
subsequent commits.

This compiles, but I have not done extensive testing.

Conflicts:
	include/config.h
	include/decl.h
	include/extern.h
	include/global.h
	include/tradstdc.h
	include/wintty.h
	src/drawing.c
	src/files.c
	src/hacklib.c
	src/mapglyph.c
	src/options.c
	sys/winnt/nttty.c
	win/tty/getline.c
	win/tty/topl.c
	win/tty/wintty.c

src/pline.c

@@ -76,11 +76,7 @@ pline VA_DECL(const char *, line)
 	    return;
 	}
 #ifndef MAC
-# ifdef UNICODE_WIDEWINPORT
-	if (no_repeat && !nhwstrcmp(toplines, line))
-# else
-	if (no_repeat && !strcmp(toplines, line))
-# endif
+	if (no_repeat && !strcmp(line, toplines))
 	    return;
 #endif /* MAC */
 	if (vision_full_recalc) vision_recalc(0);