--- a/hgext3rd/evolve/templatekw.py	Sat Nov 10 23:54:46 2018 -0500
+++ b/hgext3rd/evolve/templatekw.py	Mon Nov 19 01:41:36 2018 +0000
@@ -41,44 +41,7 @@
         return templatekw.showlist('trouble', ctx.instabilities(), args,
                                    plural='troubles')
 
-if util.safehasattr(templatekw, 'showpredecessors'):
-    templatekw.keywords["precursors"] = templatekw.showpredecessors
-else:
-    # for version <= hg4.3
-    def closestprecursors(repo, nodeid):
-        """ Yield the list of next precursors pointing on visible changectx nodes
-        """
-
-        precursors = repo.obsstore.predecessors
-        stack = [nodeid]
-        seen = set(stack)
-
-        while stack:
-            current = stack.pop()
-            currentpreccs = precursors.get(current, ())
-
-            for prec in currentpreccs:
-                precnodeid = prec[0]
-
-                # Basic cycle protection
-                if precnodeid in seen:
-                    continue
-                seen.add(precnodeid)
-
-                if precnodeid in repo:
-                    yield precnodeid
-                else:
-                    stack.append(precnodeid)
-
-    @eh.templatekw("precursors")
-    def shownextvisibleprecursors(repo, ctx, **args):
-        """Returns a string containing the list of the closest precursors
-        """
-        precursors = sorted(closestprecursors(repo, ctx.node()))
-        precursors = [node.hex(p) for p in precursors]
-
-        return templatekw._hybrid(None, precursors, lambda x: {'precursor': x},
-                                  lambda d: d['precursor'][:12])
+templatekw.keywords["precursors"] = templatekw.showpredecessors
 
 def closestsuccessors(repo, nodeid):
     """ returns the closest visible successors sets instead.