Update 01_intro_apptainer.mdx

Author: Amanda-dong

docs/hpc/15_tutorial_apptainer/01_intro_apptainer.mdx

@@ -23,10 +23,3 @@ Torch provides container images with both `.sif` and `.sqf` extensions.
 Some Torch-provided application images use `.sqf` files and are typically accessed through wrapper scripts such as `run-anaconda3-2024.10-1.bash`. These scripts handle the details of launching the application environment and are often the recommended interface for users.
 
 When available, use the wrapper script documented for that application. For general Apptainer examples in this tutorial, we use `.sif` images because they can be launched directly with standard Apptainer commands.
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-## Apptainer Cache
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-When Apptainer pulls an image from a remote registry, it stores downloaded image layers in a local cache. If the same image is requested again and has not changed, Apptainer can reuse the cached data instead of downloading it again. This reduces network transfers and can significantly speed up repeated image pulls.
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