modify tests for tag deletion

frontend/e2e/cypress/integration/tagManagement.spec.js

@@ -48,17 +48,28 @@ describe('Tag management', () => {
     cy.get('.button').click()
     cy.contains('Title must be at least 3 characters.').should('exist')
   })
-  it('tag can be deleted', () => {
+  it('tag is not deleted when No is pressed in confirmation dialog', () => {
     cy.get('#hamburger-menu-button')
       .click()
       .then(() => {
         cy.contains('Tag management').click()
       })
     cy.get('#tagTitle').type('New tag')
     cy.get('.delete-tag-button').click()
+    cy.contains('No').click()
+    cy.contains('New tag').should('exist')
+  })
+  it('tag is deleted when Yes is pressed in confirmation dialog', () => {
+    cy.get('#hamburger-menu-button')
+      .click()
+      .then(() => {
+        cy.contains('Tag management').click()
+      })
+    cy.get('#tagTitle').type('New tag')
+    cy.get('.delete-tag-button').click()
+    cy.contains('Yes').click()
     cy.contains('New tag').should('not.exist')
   })
-
   // missing test: tag associated with existing time log cannot be deleted  
   // is not tested. This is because the test would require a time log to be created and associated with a tag.'
   // and cannot be done before adding tag to time logs front end is implemented.

frontend/src/components/TagManagementPage/TagsDashboard.jsx

@@ -2,7 +2,6 @@ import React, { useState, useEffect, useRef } from 'react'
 import Typography from '@material-ui/core/Typography'
 import TextField from '@material-ui/core/TextField'
 import Button from '@material-ui/core/Button'
-import { DeleteOutlineRounded } from '@material-ui/icons'
 import tagService from '../../services/tags'
 import './TagsDashboard.css'
 import { connect } from 'react-redux'