remove not used file

Author: Huangzizhou

src/ipc/smooth_contact/smooth_collisions.cpp

@@ -6,7 +6,6 @@
 #include <ipc/distance/point_edge.hpp>
 #include <ipc/distance/point_line.hpp>
 #include <ipc/distance/point_point.hpp>
-#include <ipc/utils/getRSS.h>
 #include <ipc/utils/local_to_global.hpp>
 #include <ipc/utils/MaybeParallelFor.hpp>
 

src/ipc/utils/CMakeLists.txt

@@ -22,8 +22,6 @@ set(SOURCES
   quadrature.hpp
   tangents.cpp
   tangents.hpp
-  getRSS.h
-  getRSS.c
   math.cpp
   math.hpp
   math.tpp

src/ipc/utils/getRSS.c

@@ -18,8 +18,6 @@
 #include <igl/readCSV.h>
 #include <ipc/ipc.hpp>
 
-#include <ipc/utils/getRSS.h>
-
 using namespace ipc;
 
 // TEST_CASE(