Simplify DQD tutorial imports

[btjanaka]

Description

The imports for the DQD tutorial had some redundancies and unnecessary parts; for instance, CLIP could be installed directly with pip instead of cloning and then installing.

TODO

Questions

Status

• [x] I have read the guidelines in CONTRIBUTING.md
• [x] I have formatted my code using yapf
• [x] I have tested my code by running pytest
• [x] I have linted my code with pylint
• [x] I have added a one-line description of my change to the changelog in HISTORY.md
• [x] This PR is ready to go