Metal tvOS 13.0 Beta 2 to Beta 3 API Differences

MTLIndirectCommandBuffer.h

Removed MTLIndirectCommandTypeDispatch

MTLIndirectCommandEncoder.h

Removed -[MTLIndirectComputeCommand setImageBlockWidth:height:]

Removed -[MTLIndirectComputeCommand dispatchThreadgroups:threadsPerThreadgroup:]

MTLRenderPass.h

Removed MTLRenderPassDescriptor.renderTargetArrayLength

MTLRenderPipeline.h

Removed MTLRenderPipelineDescriptor.inputPrimitiveTopology