patch 8.1.0932: Farsi support is outdated and unused

Problem:    Farsi support is outdated and unused.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_mvc.mak b/src/Make_mvc.mak
index c948f37..c81fbd2 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -694,7 +694,7 @@
 !include Make_all.mak
 !include testdir\Make_all.mak
 
-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)
 
@@ -719,7 +719,6 @@
 	$(OUTDIR)\ex_docmd.obj \
 	$(OUTDIR)\ex_eval.obj \
 	$(OUTDIR)\ex_getln.obj \
-	$(OUTDIR)\farsi.obj \
 	$(OUTDIR)\fileio.obj \
 	$(OUTDIR)\findfile.obj \
 	$(OUTDIR)\fold.obj \
@@ -1404,8 +1403,6 @@
 
 $(OUTDIR)/ex_getln.obj:	$(OUTDIR) ex_getln.c  $(INCL)
 
-$(OUTDIR)/farsi.obj:	$(OUTDIR) farsi.c  $(INCL)
-
 $(OUTDIR)/fileio.obj:	$(OUTDIR) fileio.c  $(INCL)
 
 $(OUTDIR)/findfile.obj:	$(OUTDIR) findfile.c  $(INCL)
@@ -1646,7 +1643,6 @@
 	proto/ex_docmd.pro \
 	proto/ex_eval.pro \
 	proto/ex_getln.pro \
-	proto/farsi.pro \
 	proto/fileio.pro \
 	proto/findfile.pro \
 	proto/getchar.pro \