Revert "templates/stage-cypress-tests: Prevent race condition with support file"

This reverts commit a0fd3dc0 as that fix
does not work since the issue it aimed to fix can still happen when
running cypress tests in parallel on Jenkins.

jobs/templates/includes/stage-cypress-tests.groovy.j2

@@ -74,11 +74,6 @@ stage('Cypress tests') {
                   # copy database file to the one that will be used by django for that test runner
                   cp swh-web-test.sqlite3 swh-web-test{{ n }}.sqlite3
 
-                  # prevent a race condition when multiple cypress processes load the same support file in parallel
-                  # as copy operations are performed
-                  cp cypress/support/e2e.js cypress/support/e2e{{ n }}.js
-                  sed -i "s/supportFile: 'cypress\\/support\\/e2e.js'/supportFile: 'cypress\\/support\\/e2e{{ n }}.js'/" cypress.config.js
-
                   # run django server on a dedicated port for that test runner and wait for it to be up
                   python3 swh/web/manage.py runserver --nostatic --settings=swh.web.settings.tests 0.0.0.0:500{{ n }}&
                   wait-for-it -t 90 localhost:500{{ n }}