removed host math functions from math_functions.h

Change-Id: I90d8784e2d6b58c6fade9f0fa12c0db3ee417d3e

tests/src/deviceLib/hipTestDevice.cpp

@@ -164,13 +164,13 @@ hipMemcpy(B, Bd, SIZE, hipMemcpyDeviceToHost);
 hipMemcpy(C, Cd, SIZE, hipMemcpyDeviceToHost);
 int passed = 0;
 for(int i=0;i<512;i++){
-    if(B[i] - sinpif(1.0f) < 0.1){
+    if(B[i] - sinf(3.14*1.0f) < 0.1){
         passed = 1;
     }
 }
 passed = 0;
 for(int i=0;i<512;i++){
-    if(C[i] - cospif(1.0f) < 0.1){
+    if(C[i] - cosf(3.14*1.0f) < 0.1){
         passed = 1;
     }
 }