[Follow-up] Clean out table test

[ananzh]

Based on this comment #731 (comment)

cy.getElementByTestId('visTable')
    .should('have.class', `visTable`)

should be

cy.getElementByTestId('visTable')
    .should('have.class', 'visTable')

[ananzh]

@curq this is a follow-up of your previous contribution

[curq]

Thanks @ananzh, I made a PR for cleanup.