[2387] Remove default data from wiredata .spec files

src/lib/dns/tests/testdata/rdata_dnskey_empty_keydata_fromWire.spec

@@ -4,7 +4,4 @@
 sections: dnskey
 
 [dnskey]
-flags: 257
-protocol: 3
-algorithm: 5
 digest:

src/lib/dns/tests/testdata/rdata_dnskey_fromWire.spec

@@ -4,7 +4,4 @@
 sections: dnskey
 
 [dnskey]
-flags: 257
-protocol: 3
-algorithm: 5
 digest: BEAAAAOhHQDBrhQbtphgq2wQUpEQ5t4DtUHxoMVFu2hWLDMvoOMRXjGrhhCeFvAZih7yJHf8ZGfW6hd38hXG/xylYCO6Krpbdojwx8YMXLA5/kA+u50WIL8ZR1R6KTbsYVMf/Qx5RiNbPClw+vT+U8eXEJmO20jIS1ULgqy347cBB1zMnnz/4LJpA0da9CbKj3A254T515sNIMcwsB8/2+2E63/zZrQzBkj0BrN/9Bexjpiks3jRhZatEsXn3dTy47R09Uix5WcJt+xzqZ7+ysyLKOOedS39Z7SDmsn2eA0FKtQpwA6LXeG2w+jxmw3oA8lVUgEf/rzeC/bByBNsO70aEFTd