MOB-433 Remove FullStory

[ruixhuang]

Description / Intuition

We no longer use FullStory for tracking. Removing FullStory from codebase since it causes some crashes.

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Refactoring or Technical Debt
• [ ] Documentation update
• [ ] Other (please describe: )

[linear[bot]]

MOB-433 Remove FullStory