remove legacy Dotty Windows files

Dotty was removed in b2f287ca315dd5bf689d9ce2ca71dbfe63fb8a61.

diff --git a/windows/cmd/dotty/makefile b/windows/cmd/dotty/makefile
deleted file mode 100755 (executable)
index 11df290..0000000
--- a/windows/cmd/dotty/makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-:PACKAGE: graphviz
-
-dotty :: dotty.pdf mswin32/dotty.c \
-       -luser32 -lgdi32 -lwinspool -lcomdlg32 -ladvapi32 -lshell32
-
-$(BINDIR) :INSTALLDIR: dotty.lefty dotty_draw.lefty dotty_edit.lefty \
-       dotty_layout.lefty dotty_ui.lefty