Unused method, property, variable or parameter

From Insight https://insight.sensiolabs.com/projects/b3688b01-a0db-4325-a8ba-dcc59ab00fe4/analyses/1
Unused use statement should be avoided

From Insight https://insight.sensiolabs.com/projects/b3688b01-a0db-4325-a8ba-dcc59ab00fe4/analyses/1
Use ApcClassLoader & AppCache