patch 8.1.0932: Farsi support is outdated and unused

Problem:    Farsi support is outdated and unused.
Solution:   Delete the Farsi support.
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index 48ce397..f6ae853 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -714,7 +714,6 @@
 	$(OUTDIR)/ex_docmd.o \
 	$(OUTDIR)/ex_eval.o \
 	$(OUTDIR)/ex_getln.o \
-	$(OUTDIR)/farsi.o \
 	$(OUTDIR)/fileio.o \
 	$(OUTDIR)/findfile.o \
 	$(OUTDIR)/fold.o \
@@ -1005,7 +1004,7 @@
 	$(MAKE) -C tee clean
 
 ###########################################################################
-INCL =	vim.h alloc.h arabic.h ascii.h ex_cmds.h farsi.h feature.h globals.h \
+INCL =	vim.h alloc.h arabic.h ascii.h ex_cmds.h feature.h globals.h \
 	keymap.h macros.h option.h os_dos.h os_win32.h proto.h regexp.h \
 	spell.h structs.h term.h beval.h $(NBDEBUG_INCL)
 GUI_INCL = gui.h