message: iOS Metal delegate: support no biases in fully_connected
diff: @@ -162,12 +162,11 @@ std::vector<ComputeTaskDescriptorPtr> FullyConnected(
  auto filters = options.storage_precision == RuntimeOptions::Precision::FP32
  ? GetByteBuffer(filters_reordered)
  : VectorFloatToHalf(filters_reordered);
  - auto biases = options.storage_precision == RuntimeOptions::Precision::FP32
  - ? GetByteBuffer(attr.bias.data)
  - : VectorFloatToHalf(attr.bias.data);
  desc->immutable_buffers = {
  {"device FLT4* const matrix", filters},
  - {"device FLT4* const biases", biases},
  + {"device FLT4* const biases",
  + GetByteBufferConvertedResized(attr.bias.data, options.storage_precision,
  + attr.weights.shape.o)},
  };
  desc->uniform_buffers = {
  