Remove unused target ignore

The guest frames should not be overwriting the targets when they
fail to anchor an annotation. Instead, the anchors property is
used now to store the realized anchors from the target data.

h/static/scripts/plugin/bridge.coffee

@@ -39,9 +39,6 @@ class Annotator.Plugin.Bridge extends Annotator.Plugin
     # keys of the remote object into the local copy
     merge: (local, remote) ->
       for k, v of remote
-        if k is "target" and local[k] and local[k].length > v.length
-#          console.log "Ignoring update which would make me loose a target."
-        else
         local[k] = v
       local