Delete OSX partition and join remainder to Windows 7 partition
Solution 1:
Before you do this, realize that if you have to reinstall Windows, you will have to go through this process again. You will have to reinstall OS X, use the Bootcamp process to get the latest drivers from Apple for Windows, then install Windows and go through the process of removing OS X. Also, if there is an EFI update you can ONLY apply it if you are using OS X. Easiest solution is to just minimize the partition size of OS X, and maximize the Win7 partition. It gives the added benefit of having a recovery partition.