Drop %__find_prereq support

It has never been used anyway, and now it stands in the way of replacing
deprecated PreReq with Requires(pre,postun).

build/files.c

@@ -2446,11 +2446,8 @@ DepMsg_t depMsgs[] = {
   { "Provides",		{ "%{?__find_provides}", 0 },
 	RPMTAG_PROVIDENAME, RPMTAG_PROVIDEVERSION, RPMTAG_PROVIDEFLAGS,
 	0, -1 },
-  { "PreReq",		{ "%{?__find_prereq}", 0 },
-	RPMTAG_REQUIRENAME, RPMTAG_REQUIREVERSION, RPMTAG_REQUIREFLAGS,
-	RPMSENSE_PREREQ, 0 },
   { "Requires",		{ "%{?__find_requires}", 0 },
-	-1, -1, RPMTAG_REQUIREFLAGS,	/* XXX inherit name/version arrays */
+	RPMTAG_REQUIRENAME, RPMTAG_REQUIREVERSION, RPMTAG_REQUIREFLAGS,
 	RPMSENSE_PREREQ, RPMSENSE_PREREQ },
   { "Requires(interp)",	{ 0, "interp", 0 },
 	-1, -1, RPMTAG_REQUIREFLAGS,

doc/manual/dependencies

@@ -179,7 +179,7 @@ defined in the spec file. To allow for maximum configurability the
 dependency programs are shell scripts which can be duplicated and edited
 for site specific needs.
 
-The macros: %__find_provides, %__find_prereq, %__find_requires,
+The macros: %__find_provides, %__find_requires,
 %__find_conflicts, %__find_obsoletes, if they exist, are expanded to
 the name of a program to exec. For each package, the program receives
 the glob'ed %files manifest on stdin and returns dependencies on stdout. The

macros.in

@@ -119,7 +119,6 @@
 %__find_requires	@FINDREQUIRES@
 %__find_scriptlet_requires	@RPMCONFIGDIR@/find-scriptlet-requires
 %__find_debuginfo_files	@RPMCONFIGDIR@/find-debuginfo-files
-#%__find_prereq		???
 #%__find_conflicts	???
 #%__find_obsoletes	???