Clean up code to remove old calendar logic and references

We have old code from the first ever calendar widget in the Scheduling Tool (Unused variables, commented code, hidden controls, etc.)

The issue identifies obsolete logic in the Scheduling Tool's first calendar widget, including unused variables, commented code, and hidden controls. First locate the calendar widget and inspect its current references; done means the old logic and references are removed without affecting the active scheduling behavior.

Written by the indexing model from the issue text.