Build Packages And Env: The node was low on resource: ephemeral-storage

@ aicrowd_team Issue : Evaluation failing with this error : " Build Packages And Env : The node was low on resource: ephemeral-storage. Container wait was using 84Ki, which exceeds its request of 0."
Repository size is 44GB and I know it may be above the limits. But problem is git lfs files are not getting removed by 'git rm ’ commands. When I remove large files from repository, they are going from master branch but they still lies somewhere under my repo space because I can see these files from earlier commits. Also, repository size still shows 44 GB with exact number of files as before.
So, wanted to check how I can remove these that will free up the space.