Code remaining in the socket

hi

I tried to style the main menu links and has pasted different code into the general styling code area.

Now I removed all of the code but still have this in the socket:
.nonfixed_header .header_bg, #header_meta, #header { -webkit-border-top-right-radius: 10px; -webkit-border-top-left-radius: 10px; -moz-border-radius-topright: 10px; -moz-border-radius-topleft: 10px; border-top-left-radius: 10px; border-top-right-radius: 10px; }

In what file can I remove it?

Kind regards
Micke