Revert "Added canMapHostMemory feature"

This reverts commit af4edd277f.

tests/src/hipHostAlloc.cpp

@@ -1,20 +0,0 @@
-#include<iostream>
-#include"test_common.h"
-
-__global__ void Add(hipLaunchParm lp, float *Ad, float *Bd, float *Cd){
-int tx = hipThreadIdx_x + hipBlockIdx_x * hipBlockDim_x;
-Cd[tx] = Ad[tx] + Bd[tx];
-}
-
-int main(){
-float *A, *B, *C;
-float *Ad, *Bd, *Cd;
-
-hipDeviceProp_t prop;
-int device;
-hipGetDevice(&device);
-hipDeviceGetProperties(&prop, device);
-if(prop.canMapHostMemory != 1){
-std::cout<<"Exiting.."<<std::endl;
-}
-}