Removed unnecessary calculations, cleaned up ChElementBrick_9.cpp
Removed unnecessary calculations, cleaned up ChElementBrick_9.cpp

rserban/chrono,amelmquist/chrono,projectchrono/chrono,andrewseidl/chrono,projectchrono/chrono,projectchrono/chrono,dariomangoni/chrono,tjolsen/chrono,armanpazouki/chrono,amelmquist/chrono,dariomangoni/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,jcmadsen/chrono,andrewseidl/chrono,amelmquist/chrono,armanpazouki/chrono,jcmadsen/chrono,rserban/chrono,amelmquist/chrono,dariomangoni/chrono,jcmadsen/chrono,dariomangoni/chrono,projectchrono/chrono,armanpazouki/chrono,dariomangoni/chrono,armanpazouki/chrono,rserban/chrono,armanpazouki/chrono,rserban/chrono,rserban/chrono,andrewseidl/chrono,projectchrono/chrono,jcmadsen/chrono,tjolsen/chrono,jcmadsen/chrono,tjolsen/chrono,jcmadsen/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,tjolsen/chrono,jcmadsen/chrono,rserban/chrono,Milad-Rakhsha/chrono,tjolsen/chrono,andrewseidl/chrono,andrewseidl/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,rserban/chrono,amelmquist/chrono,dariomangoni/chrono,amelmquist/chrono,Milad-Rakhsha/chrono