feat: remove Examples frontend reliance on batch job

[mantariksh]

Problem

We are removing the batch job which counts daily submissions per form, but the frontend of the Examples page still relies on data which is computed using the batch job, namely the count of submissions and the date of last submission.

Related to #984

Solution

Remove the portions of the frontend which rely on this data.

Screenshots

Last submitted

Before

After

(missing logo due to localhost)

Submission count

Before

After

Tests

• Go to Examples page and check that "Last Submitted" does not show in the form cards. Check that the page renders correctly in all screen sizes.
• Open a form card and check that the number of submissions does not show. Check that the modal renders correctly in all screen sizes.