[1866] removed unnecessary file

src/lib/dns/Makefile.am

@@ -97,7 +97,6 @@ EXTRA_DIST += rdata/generic/mr_9.txt
 EXTRA_DIST += rdata/generic/nid_104.txt
 EXTRA_DIST += rdata/generic/null_10.txt
 EXTRA_DIST += rdata/generic/nxt_30.txt
-EXTRA_DIST += rdata/generic/proforma.txt
 EXTRA_DIST += rdata/generic/rt_21.txt
 EXTRA_DIST += rdata/generic/sig_24.txt
 EXTRA_DIST += rdata/generic/tkey_249.txt

src/lib/dns/rdata/generic/proforma.txt

@@ -1,4 +0,0 @@
-This RR type is not yet implemented; this file is used to generate
-the corresponding RRType constant and a mapping with its textual
-representation, without the Rdata code.  When the Rdata support is
-complete this file must be removed.