Delete unused files in the window(1) directory that contain a colon.

During the import of the 4.4BSD Lite sources, four files got added to
the repository called :tt, :tty, :var and :ww. They seem to contain some
kind of debug information. These files aren't used/installed anywhere.

Unfortunately the colons in the filenames prevents us from checking out
the source tree on file systems that don't support colons (such as FAT).
Just remove these unneeded files to keep SVN happy.

Reported by:	Rohit Tripathi <rohit trip gmail com>
MFC after:	3 days

usr.bin/window/:tt

@@ -1,11 +0,0 @@
-./"init"16t"end"n2p
-+/"move"16t"insline"16t"delline"16t"delchar"n4p
-+/"write"16t"putc"16tn2p
-+/"clreol"16t"clreos"16t"clear"n3p
-+/"scroll_down"16t"scroll_up"16t"setscroll"n3p
-+/"setinsert"16t"setmodes"n2p
-+/"modes"8t"nmodes"8t"insert"8t"ninsert"n4b
-+/"row"16t"col"16t"scrtop"16t"sclbot"n4D
-+/"nrow"16t"ncol"16t"hasins"8t"avlmods"8t"wrap"8t"retain"n2D4b
-+/"frame"
-*./16b

usr.bin/window/:tty

@@ -1,6 +0,0 @@
-./"sgttyb:"8t"ispeed"8t"ospeed"8t"erase"8t"kill"8t"flags"n8tbbC8tC8tx
-+/"tchars:"8t"intrc"8t"quitc"8t"startc"8t"stopc"8t"eofc"8t"brkc"
-+/8tC8tC8tC8tC8tC8tC
-+/"ltchars:suspc"8t"dsuspc"8t"rprntc"8t"flushc"8t"werasc"8t"lnextc"
-+/8tC8tC8tC8tC8tC8tC2+
-+/"lmode"16t"ldisc"16t"fflags"nXDX

usr.bin/window/:var

@@ -1,2 +0,0 @@
-./"left"16t"right"16t"v_type"8t"v_val"npp4+b3+x
-*(.+8)/"name: "S

usr.bin/window/:ww

@@ -1,19 +0,0 @@
-./"state"8t"oflags"nbb++
-+/"forw"16t"back"16t"index"8t"order"nppbb++
-+/"w.nr"16t"w.nc"nDD
-+/"w.t"16t"w.b"16t"w.l"16t"w.r"nDDDD
-+/"b.nr"16t"b.nc"nDD
-+/"b.t"16t"b.b"16t"b.l"16t"b.r"nDDDD
-+/"i.nr"16t"i.nc"nDD
-+/"i.t"16t"i.b"16t"i.l"16t"i.r"nDDDD
-+/"cur.r"16t"cur.c"nDD
-+/"win"16t"buf"16t"fmap"16t"nvis"npppp
-+/"wstate"8t"modes"8t"insert"8t"mapnl"8t"noupd"n5b
-+/"unctrl"8t"nointr"8t"hascurs"8t"hasframe"n4b
-+/"ispty"8t"stopped"8t"pty"16t"socket"16t"pid"nbb+3D
-+/"ttyname"n11C+
-+/"ob"16t"obe"16t"obp"16t"obq"n4p
-+/"center"8t"id"8t"label"nbb++p
-+/"alt.nr"16t"alt.nc"nDD
-+/"alt.t"16t"alt.b"16t"alt.l"16t"alt.r"nDDDD
-+/t