Remove disable_csp_unsafe_inline configuration

[aduth]

🛠 Summary of changes

Removes the disable_csp_unsafe_inline configuration.

Why?

• It does not appear to be used
• It adds unnecessary risk to have a configuration responsible for controlling a security feature which requires a lot of mental gymnastics to navigate the negation and expected impact of the value (a value of "true" means "disabling" which means "not adding the exemption" which means "enforcement applies")

Slack discussion: https://gsa-tts.slack.com/archives/C0NGESUN5/p1699554919541029

📜 Testing Plan

Observe that CSP is unimpacted.

Build should pass.