Removes ZeroFrog's "optimized" memcpy and memcmp functions.

These were only compiled in on Windows and x86_32.
They provided "optimized" copies and compares based on blocksizes for the AMD Athlon and Duron CPU families.
The code was taken from something that AMD provides with a as-is license.
Just get rid of this crap.

Source/Core/VideoCommon/VideoCommon.vcxproj

@@ -59,7 +59,6 @@
     <ClCompile Include="ImageWrite.cpp" />
     <ClCompile Include="IndexGenerator.cpp" />
     <ClCompile Include="MainBase.cpp" />
-    <ClCompile Include="memcpy_amd.cpp" />
     <ClCompile Include="OnScreenDisplay.cpp" />
     <ClCompile Include="OpcodeDecoding.cpp" />
     <ClCompile Include="PerfQueryBase.cpp" />
@@ -159,4 +158,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>