How to delete header text?

Don’t remove it – just move it a couple of feet to the left 🙂
h1 {
font-size: 4em;
text-indent:-500em;
}
Alter your h1 in the css to be like that.

Your wp-layout.css

Well the address is
http://gerhard.freeserverhost.com/wordpress/wp-layout.css

Sorry ! It’s not there …. find the
h1 {
and whatever is there replace it with the above.
Apologies !