remove compatibility code wrt. presence of FindNextChild in libEBML

The version number requirement/check suffices.

ac/matroska.m4

@@ -30,44 +30,6 @@ if test x"$EBML_MATROSKA_INTERNAL" = xyes; then
   fi
 fi
 
-AC_DEFUN([AX_EBML_FINDNEXTCHILD],[
-  AC_CACHE_CHECK([if libEBML contains FindNextChild], [ax_cv_ebml_findnextchild],[
-    if test x"$EBML_MATROSKA_INTERNAL" = xyes; then
-      ax_cv_ebml_findnextchild=yes
-    else
-      CXXFLAGS_SAVED=$CXXFLAGS
-      CXXFLAGS="$EBML_CFLAGS $MATROSKA_CFLAGS"
-      export CXXFLAGS
-
-      AC_LANG_PUSH(C++)
-      AC_TRY_COMPILE(
-        [
-#include <matroska/KaxInfo.h>
-#include <matroska/KaxSegment.h>
-
-using namespace libebml;
-using namespace libmatroska;
-        ],
-        [
-  EbmlMaster *m = new KaxSegment;
-  EbmlElement *e = new KaxTitle;
-  FindNextChild(*m, *e);
-    ],
-        [ax_cv_ebml_findnextchild="yes"],
-        [ax_cv_ebml_findnextchild="no"])
-      AC_LANG_POP
-
-      CXXFLAGS="$CXXFLAGS_SAVED"
-    fi
-  ])
-
-  if test x"$ax_cv_ebml_findnextchild" = xyes; then
-    AC_DEFINE(HAVE_EBML_FINDNEXTCHILD, 1, [Define if libEBML contains FindNextChild])
-  fi
-])
-
-AX_EBML_FINDNEXTCHILD
-
 AC_SUBST(EBML_MATROSKA_INTERNAL)
 AC_SUBST(EBML_CFLAGS)
 AC_SUBST(EBML_LIBS)

src/common/ebml.h

@@ -209,14 +209,6 @@ FindChild(libebml::EbmlElement const *e) {
   return static_cast<A *>(m->FindFirstElt(EBML_INFO(A)));
 }
 
-#if !defined(HAVE_EBML_FINDNEXTCHILD)
-template <typename A> A*
-FindNextChild(libebml::EbmlMaster &Master,
-              A const  &PastElt) {
-  return static_cast<A *>(Master.FindNextElt(PastElt, false));
-}
-#endif  // !HAVE_EBML_FINDNEXTCHILD
-
 template<typename A> A &
 GetChild(libebml::EbmlMaster *m) {
   return GetChild<A>(*m);