Cleanup leftover miniconda brew installation

[atalman]

Similar to pytorch/pytorch#156898
We are seeing: https://github.com/pytorch/torchcodec/actions/runs/15980677970/job/45074130055

+ conda run -p /Users/ec2-user/runner/_work/_temp/conda_environment_15980677970 python3 -m pip install delocate==0.10.7
/var/folders/bm/fnn3xd1d39lcpbxrgwys1c140000gn/T/tmp48ijo2b1: line 1: /opt/homebrew/Caskroom/miniconda/base/bin/conda: No such file or directory

CondaError: Run 'conda init' before 'conda activate'

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try brew install
    xyz, where xyz is the package you are trying to
    install.
    
    If you wish to install a Python library that isn't in Homebrew,
    use a virtual environment:
    
    python3 -m venv path/to/venv
    source path/to/venv/bin/activate
    python3 -m pip install xyz

[vercel]

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