Remove customization and support mail from branding section

[asekawa]

Describe the issue:

Remove customization and support mail from the banding section

How to reproduce:

1.visit the IS console 2.Go to Customization ->branding 3.Go to advanced section

Expected behavior:

Environment information (Please complete the following information; remove any unnecessary fields) :

• Product Version: [e.g., 7.0.0 M2 - https://github.com/wso2/product-is/releases/tag/v7.0.0-m2]
• OS: [e.g., Mac]
• Database: [e.g., MySQL, H2]
• Userstore: [e.g., LDAP, JDBC]

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[asekawa]

@DilshanSenarath please look into this checklist

• [ ] Is this document impacted?
• [ ] Is any E2E affected with the fix?
• [ ] Are unit tests affected?
• [ ] Are integration tests affected?
• [ ] Has this fix been tested on the latest Jenkins build after merging the changes? (Please Attach Proof, Screenshots, Screen recordings)
• [ ] Are all the relevant sub-tasks updated as complete (e.g., Cloud readiness tasks and migrations, docs)?
• [ ] Does this change impact the on-prem environment only or required to be specifically onboarded to Asgardeo?