Remove LLAMA from documentation

Description

Remove LLAMA from documentation

The LLAMA pipeline is no longer operated on the LVK side and does not upload to GraceDB, so remove it from the documentation. Fixes #406 (closed).

Checklist

Thanks for your contribution! Please complete and check off the following quality control tasks.

Changes:

• I created this merge request from my own fork and from a branch other than main or master.
• I checked that the CI pipeline completes without errors.
• I added a change log entry (or this is a minor change that does not require a change log entry).

Whitespace:

• No line that I added ends with trailing whitespace.
• Every file that I modified ends with one blank line.

Grammar and spelling:

• I proofread my contribution and made sure that it is free from spelling and grammatical errors.
• I used American English rather than British English spelling.
• I used the Oxford (serial) comma in lists of three or more items.
• I minimized use of the passive voice.

Figures and code:

• I contributed plot directive code to generate figures (or I did not contribute any figures).
• I contributed Python code that conforms to the PEP 8 style guide (or I did not contribute Python code).