Remove everything relating to PFA and AFM files.

Nothing in the build system uses them now, and I'd already stopped
distributing them.

Makefile

@@ -3,8 +3,6 @@ FONTBASES = bedstead bedstead-extended bedstead-semicondensed \
 
 SFDFILES = $(addsuffix .sfd, $(FONTBASES))
 OTFFILES = $(addsuffix .otf, $(FONTBASES))
-PFAFILES = $(addsuffix .pfa, $(FONTBASES))
-AFMFILES = $(addsuffix .afm, $(FONTBASES))
 
 DISTFILES = bedstead.c Makefile COPYING \
 	$(OTFFILES) \
@@ -59,9 +57,6 @@ bedstead-chiseltip.sfd: strokefont.py bedstead-oc.sfd
 	    -c 'Open($$1); Generate($$2)' \
 	    $< $*.otf
 
-%.pfa %.afm: %.sfd
-	fontforge -lang=ff -c 'Open($$1); Generate($$2)' $< $*.pfa
-
 %.png: %.ps $(OTFFILES)
 	gs -P -q -dSAFER -sDEVICE=pnggray -dTextAlphaBits=4 -o $@ $<
 
@@ -76,7 +71,7 @@ bedstead-complement.pdf: bedstead-complement.ps bedstead.otf
 
 .PHONY: clean
 clean:
-	rm -f bedstead *.sfd *.otf *.bdf *.pfa *.afm *.png *.pdf complement.ps
+	rm -f bedstead *.sfd *.otf *.bdf *.png *.pdf complement.ps
 
 .PHONY: dist