Edublogs Remove #main-header-inner-content h4

I am trying to remove the shadow from:

#main-header-inner-content h4 {
text-shadow:2pt 1pt 2pt #D9E8FF !important;

within the edublogs theme. I can locate the code that needs to be changed with firebug but cannot locate the file to edit. I assumed it would be in base.css where the other aspects of the #main-header-inner-content h4 are dealt with however this was not the case. Any help would be appreciated. Thanks.

- Justin