Remove EXHEADER, TEST, APPS, links:, install: and uninstall: where relevant

With no more symlinks, there's no need for those variables, or the links
target.  This also goes for all install: and uninstall: targets that do
nothing but copy $(EXHEADER) files, since that's now taken care of by the
top Makefile.

Also, removed METHTEST from test/Makefile.  It looks like an old test that's
forgotten...

Reviewed-by: Rich Salz <rsalz@openssl.org>

apps/Makefile

@@ -68,12 +68,10 @@ E_SRC=	verify.c asn1pars.c req.c dgst.c dh.c enc.c passwd.c gendh.c errstr.c ca.
 
 SRC=$(E_SRC)
 
-EXHEADER=
 HEADER=	apps.h progs.h s_apps.h \
-	testdsa.h testrsa.h \
-	$(EXHEADER)
+	testdsa.h testrsa.h
 
-ALL=    $(GENERAL) $(SRC) $(HEADER)
+ALL=	$(GENERAL) $(SRC) $(HEADER)
 
 top:
 	@(cd ..; $(MAKE) DIRS=$(DIR) all)
@@ -135,8 +133,6 @@ tags:
 
 tests:
 
-links:
-
 lint:
 	lint -DLINT $(INCLUDES) $(SRC)>fluff