Fix ReferenceError: docById is not defined in activity.js

[Sarvesh2783]

Fixes #4292 -ReferenceError: docById is not defined in activity.js during initialization

This PR resolves the ReferenceError: docById is not defined in activity.js by replacing the undefined docById function with document.getElementById.

Steps to Reproduce the Error:

• Clone the repository and set up the project locally.
• Start a local server (e.g., 127.0.0.1:5500).
• Open the project in a browser.
• Observe the console error

Root Cause:

The docById function is not defined in the codebase, leading to this error.

Proposed Solution:

Replaced all occurrences of docById with document.getElementById to ensure proper functionality.

Additional Details

• This change addresses only the docById error,.
• The fix has been tested locally to confirm that the error no longer appears in the console.

[walterbender]

Isn't this defined in utils.js? Why do we need to define it twice?

[FirePheonix]

all we have to do was to comment out the console.log(error) in this one.

[Sarvesh2783]

@walterbender Thank you for pointing this out! I missed that the docById function was already defined elsewhere. I'll update the PR to reuse the existing function instead of redefining it.