Merge pull request #197 from fabaff/fedora-eol

Fedora 25 is eol

src/fedora.ipxe

@@ -14,8 +14,6 @@ menu Fedora - ${arch} - Image Sig Checks: [${img_sigs_enabled}]
 item --gap Latest Releases
 item 27 ${space} ${os} 27
 item 26 ${space} ${os} 26
-item 25 ${space} ${os} 25
-item 24 ${space} ${os} 24
 isset ${osversion} || choose osversion || goto linux_menu
 set ova ${os} ${osversion}
 goto product_sku