Is MLX_ENABLE_AWS environment variable required?

[hwhsu1231]

Hello MLX Team,

I noticed that the MLX_ENABLE_AWS environment variable is currently specified when building mlx-data in .circleci/config.yml:

mlx-data/.circleci/config.yml

Lines 47 to 49 in 2f431e9

	CMAKE_ARGS="-DMLX_ENABLE_AWS=ON" \
	CMAKE_BUILD_PARALLEL_LEVEL=`sysctl -n hw.ncpu` \
	pip install . -v

mlx-data/.circleci/config.yml

Lines 115 to 116 in 2f431e9

	CMAKE_ARGS="-DMLX_ENABLE_AWS=ON" \
	python setup.py develop

mlx-data/.circleci/config.yml

Lines 149 to 150 in 2f431e9

	CMAKE_ARGS="-DMLX_ENABLE_AWS=ON" \
	python setup.py develop

However, I encountered the following message during the build process:

  -- Configuring done (8.7s)
  -- Generating done (0.1s)
  CMake Warning:
    Manually-specified variables were not used by the project:
      MLX_ENABLE_AWS

Based on my testing, the build remains unaffected even without this environment variable. Given this, would it be better to remove it?