Remove packages affecting build

Problem

It seems that pip install runs into a build issue when beautifulsoup installs soupsieve which in turns needs setuptools_scm. This package seems to error gitlab-org/security-products/analyzers/gemnasium!574 (comment 1567202624)

Since this dependency does not affect the vulnerabilities detected, removing it should be OK in the short term. In the long term a more reasonable fix would be to create a pip install which works for all the old dependencies.