Removing unnecessary include directives and use forward declaration instead
Removing unnecessary include directives and use forward declaration instead

eric-haibin-lin/peloton-1,AngLi-Leon/peloton,wangziqi2016/peloton,prashasthip/peloton,AngLi-Leon/peloton,jessesleeping/iso_peloton,prashasthip/peloton,vittvolt/15721-peloton,cmu-db/peloton,malin1993ml/peloton,seojungmin/peloton,haojin2/peloton,apavlo/peloton,eric-haibin-lin/peloton-1,wangziqi2016/peloton,AngLi-Leon/peloton,seojungmin/peloton,jessesleeping/iso_peloton,phisiart/peloton-p3,prashasthip/peloton,cmu-db/peloton,haojin2/peloton,prashasthip/peloton,seojungmin/peloton,AllisonWang/peloton,AllisonWang/peloton,haojin2/peloton,vittvolt/peloton,vittvolt/15721-peloton,PauloAmora/peloton,phisiart/peloton-p3,PauloAmora/peloton,yingjunwu/peloton,phisiart/peloton-p3,vittvolt/peloton,apavlo/peloton,vittvolt/15721-peloton,wangziqi2016/peloton,AngLi-Leon/peloton,apavlo/peloton,vittvolt/15721-peloton,malin1993ml/peloton,vittvolt/peloton,phisiart/peloton-p3,phisiart/peloton-p3,yingjunwu/peloton,phisiart/peloton-p3,PauloAmora/peloton,haojin2/peloton,malin1993ml/peloton,jessesleeping/iso_peloton,cmu-db/peloton,AllisonWang/peloton,yingjunwu/peloton,jessesleeping/iso_peloton,vittvolt/peloton,AllisonWang/peloton,eric-haibin-lin/peloton-1,cmu-db/peloton,malin1993ml/peloton,vittvolt/peloton,yingjunwu/peloton,PauloAmora/peloton,PauloAmora/peloton,wangziqi2016/peloton,apavlo/peloton,eric-haibin-lin/peloton-1,prashasthip/peloton,ShuxinLin/peloton,AngLi-Leon/peloton,vittvolt/15721-peloton,ShuxinLin/peloton,apavlo/peloton,eric-haibin-lin/peloton-1,wangziqi2016/peloton,jessesleeping/iso_peloton,cmu-db/peloton,seojungmin/peloton,haojin2/peloton,malin1993ml/peloton,prashasthip/peloton,vittvolt/15721-peloton,AllisonWang/peloton,jessesleeping/iso_peloton,apavlo/peloton,yingjunwu/peloton,AngLi-Leon/peloton,ShuxinLin/peloton,jessesleeping/iso_peloton,cmu-db/peloton,wangziqi2016/peloton,seojungmin/peloton,ShuxinLin/peloton,AllisonWang/peloton,ShuxinLin/peloton,vittvolt/peloton,haojin2/peloton,PauloAmora/peloton,yingjunwu/peloton,malin1993ml/peloton,ShuxinLin/peloton,seojungmin/peloton,eric-haibin-lin/peloton-1