trunk-tracking: removed unneeded import
trunk-tracking: removed unneeded import

0x0mar/ngx_pagespeed,0x0mar/ngx_pagespeed,pagespeed/ngx_pagespeed,pagespeed/ngx_pagespeed,wanrui/ngx_pagespeed,digideskio/ngx_pagespeed,digideskio/ngx_pagespeed,wanrui/ngx_pagespeed