outerContainer is not used in createSpikelines - remove it

Author: archmoj

src/components/fx/hover.js

@@ -657,7 +657,6 @@ function _hover(gd, evt, subplot, noHoverEvent) {
     var spikelineOpts = {
         fullLayout: fullLayout,
         container: fullLayout._hoverlayer,
-        outerContainer: fullLayout._paperdiv,
         event: evt
     };
     var oldspikepoints = gd._spikepoints;