chore(table-tests): remove unnecessary statements in unit test
chore(table-tests): remove unnecessary statements in unit test

when relying on tick to simulate passage of time, we only need
to call fixture.detectChanges() after the tick() statement

tested with ngx-bootstrap v1.8.0 and 1.9.3

dlabrecq/patternfly-ng,patternfly/patternfly-ng,dlabrecq/patternfly-ng,patternfly/patternfly-ng,patternfly/patternfly-ng,dlabrecq/patternfly-ng,dlabrecq/patternfly-ng,patternfly/patternfly-ng