Remove old code from buildsupport

src/parser_version.ads

 package Parser_Version is
    Parser_Release : constant String :=
-      "ae93668 ; Commit Date:   Sun Nov 26 21:38:55 2017 ";
+      "f39d2e0 ; Commit Date:   Mon Nov 27 13:42:45 2017 ";
    Ocarina_Version : constant String :=
       "Ocarina 2017.x (Working Copy from r0b92ed3)";
 end Parser_Version;
\ No newline at end of file