Ignore unused local variable in all examples compile
Ignore unused local variable in all examples compile

This makes it consistent with the eslint configuration for examples in
examples/.eslintrc.

bjornharrtell/ol3,klokantech/ol3,geekdenz/openlayers,gingerik/ol3,thhomas/ol3,tschaub/ol3,gingerik/ol3,oterral/ol3,mzur/ol3,mzur/ol3,geekdenz/ol3,stweil/ol3,stweil/ol3,gingerik/ol3,mzur/ol3,geekdenz/openlayers,openlayers/openlayers,stweil/openlayers,adube/ol3,geekdenz/openlayers,bjornharrtell/ol3,tschaub/ol3,ahocevar/openlayers,ahocevar/openlayers,gingerik/ol3,planetlabs/ol3,ahocevar/ol3,geekdenz/ol3,openlayers/openlayers,thhomas/ol3,fredj/ol3,thhomas/ol3,fredj/ol3,oterral/ol3,planetlabs/ol3,geekdenz/ol3,adube/ol3,fredj/ol3,klokantech/ol3,stweil/openlayers,klokantech/ol3,ahocevar/ol3,planetlabs/ol3,openlayers/openlayers,planetlabs/ol3,stweil/ol3,oterral/ol3,tschaub/ol3,mzur/ol3,tschaub/ol3,adube/ol3,ahocevar/ol3,stweil/ol3,fredj/ol3,thhomas/ol3,klokantech/ol3,stweil/openlayers,bjornharrtell/ol3,ahocevar/ol3,geekdenz/ol3,ahocevar/openlayers