Removing reference to device.js in code_reference.md
Removing reference to device.js in code_reference.md

kyork-cl/zetta,eclub-sense/zetta2.0-runtime,zettajs/zetta,DhruvKumar/zetta,zettajs/zetta,eclub-sense/zetta2.0-runtime,Vam85/zetta,Vam85/zetta,eclub-sense/zetta,eclub-sense/zetta,DhruvKumar/zetta,kyork-cl/zetta