Remove unused timer routines in "NCV.cu"

[SunBlack]

Found this during #3134. Seems this is code that only compiles under Windows or with a GNUC compiler.

[SergioRAgostinho]

What about this section?

pcl/gpu/people/src/cuda/nvidia/NCV.hpp

Lines 352 to 367 in 23690b4

	//==============================================================================
	//
	// Timer
	//
	//==============================================================================
	using NcvTimer = struct _NcvTimer *;
	NCV_EXPORTS NcvTimer ncvStartTimer();
	NCV_EXPORTS double ncvEndQueryTimerUs(NcvTimer t);
	NCV_EXPORTS double ncvEndQueryTimerMs(NcvTimer t);

[taketwo]

Yes, but these functions are not used anywhere and they are not API since this file is buried in src/ tree. So safe to remove.

[SergioRAgostinho]

No question. I just want to add the section I highlighted to the list of removed things.