While you can remove it if you PREPARE to go without (read http://www.google.com/search?hl=en&source=hp&q=remove+dell+restore+partition )
I wonder if you are really wanting to turn off the low space notifications that plague those that use registry cleaners? If so, just type in the message you want gone into google to find how people disable low space notification on drive D:
y laptop is a Dell Inspiron . 1525. Working with Windows Vista. How can I reduce the contents of my recovery disc (D please?