You can try this: clear "Internet" cache and data under Setting > Applications > Manage applications > choose tab All > and then search "Internet" , and then it will be back like the original one.
Or, to remove all of the search properties from your phone:
To remove the search from the notification area please do the following –
Click the search icon on the notification and you will reach the search page (www.searchmobileonline.com). On this page, scroll down to the bottom where you will see a “settings” link. Click it. Once clicked you will get to the settings page where you can see an option to remove the search from the notification area.
- Search Icon on Home Screen –
Click and hold the search icon. Drag it to the trash in the bottom of the screen.
Click and hold the bookmark. Choose “delete bookmark” from the menu.