SWDEV-440746 - Remove obsolete code

The "optimized" version of memcpy is outdated and
was used in win32 only.

Change-Id: I7f2e0e9051e37cec95438266824b5b0025c324c6


[ROCm/clr commit: 7448113cfc]

projects/clr/rocclr/device/pal/palprogram.cpp

@@ -139,10 +139,10 @@ bool Segment::alloc(HSAILProgram& prog, amdgpu_hsa_elf_segment_t segment, size_t
 
 void Segment::copy(size_t offset, const void* src, size_t size) {
   if (cpuAccess_ != nullptr) {
-    amd::Os::fastMemcpy(cpuAddress(offset), src, size);
+    std::memcpy(cpuAddress(offset), src, size);
   } else {
     if (cpuMem_ != nullptr) {
-      amd::Os::fastMemcpy(cpuAddress(offset), src, size);
+      std::memcpy(cpuAddress(offset), src, size);
     }
     amd::ScopedLock k(gpuAccess_->dev().xferMgr().lockXfer());
     VirtualGPU& gpu = *gpuAccess_->dev().xferQueue();
@@ -568,7 +568,7 @@ void* PALHSALoaderContext::SegmentAlloc(amdgpu_hsa_elf_segment_t segment, hsa_ag
 bool PALHSALoaderContext::SegmentCopy(amdgpu_hsa_elf_segment_t segment, hsa_agent_t agent,
                                       void* dst, size_t offset, const void* src, size_t size) {
   if (program_->isNull()) {
-    amd::Os::fastMemcpy(reinterpret_cast<address>(dst) + offset, src, size);
+    std::memcpy(reinterpret_cast<address>(dst) + offset, src, size);
     return true;
   }
   Segment* s = reinterpret_cast<Segment*>(dst);