* subversion/libsvn_subr/mergeinfo.c
  (svn_rangelist__combine_adjacent_ranges): Use an existing function to
    delete an element from an array. A follow-up to the recent r1460763
    which fixed a bug in the manual code, which demonstrates why it's
    safer to call a function.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1460802 13f79535-47bb-0310-9956-ffa450edef68