Method RemoveAtFast

BeefySysLib/util/Array.h:593–605

'Fast' because it's allowed to change item order

	// 'Fast' because it's allowed to change item order
	void RemoveAtFast(intptr idx)
	{
		BF_ASSERT((uintptr)idx < (uintptr)this->mSize);

		this->mVals[idx].~T();

		// If we're removing the last element then we don't have to move anything
		if (idx != this->mSize - 1)
		{
			new (&this->mVals[idx]) T(std::move(this->mVals[this->mSize - 1]));
		}
		this->mSize--;
	}

	void RemoveRange(intptr idx, intptr length)
	{