Hi Girish,
Steps to Remove Sample Data:
1. Open Power Platform Admin Center
Navigate to: https://admin.powerplatform.microsoft.com
Sign in with your administrator credentials.
2. Select the Environment
In the left-hand navigation pane, click on Environments.
From the list, choose the environment where you want to remove sample data.
3. Access Environment Settings
With the environment selected, click on Settings in the top menu.
4. Navigate to Data Management
Under the Settings panel, scroll down and click on Data Management.
5. Select Sample Data
In the Data Management section, click on Sample Data.
6. Remove Sample Data
Click the Remove Sample Data button.
Confirm the removal when prompted.