IGNITE-21185 Strings should be compared with equals() instead of ==.

[dk2k]

Removed unneded cast. Issues found during static analysis.

we ask you to ensure the following steps have been taken:

The Contribution Checklist

• [x] There is a single JIRA ticket related to the pull request.
• [x] The web-link to the pull request is attached to the JIRA ticket.
• [ ] The JIRA ticket has the Patch Available state.
• [x] The pull request body describes changes that have been made. The description explains WHAT and WHY was made instead of HOW.
• [x] The pull request title is treated as the final commit message. The following pattern must be used: IGNITE-XXXX Change summary where XXXX - number of JIRA issue.
• [ ] A reviewer has been mentioned through the JIRA comments (see the Maintainers list)
• [ ] The pull request has been checked by the Teamcity Bot and the green visa attached to the JIRA ticket (see TC.Bot: Check PR)