Remove urras as a default trusted directory authority

It had been a directory authority since 0.2.1.20.

src/or/config.c

@@ -802,8 +802,6 @@ add_default_trusted_dir_authorities(dirinfo_type_t type)
     "dannenberg orport=443 no-v2 "
       "v3ident=0232AF901C31A04EE9848595AF9BB7620D4C5B2E "
       "193.23.244.244:80 7BE6 83E6 5D48 1413 21C5 ED92 F075 C553 64AC 7123",
-    "urras orport=80 no-v2 v3ident=80550987E1D626E3EBA5E5E75A458DE0626D088C "
-      "208.83.223.34:443 0AD3 FA88 4D18 F89E EA2D 89C0 1937 9E0E 7FD9 4417",
     "maatuska orport=80 no-v2 "
       "v3ident=49015F787433103580E3B66A1707A00E60F2D15B "
       "171.25.193.9:443 BD6A 8292 55CB 08E6 6FBE 7D37 4836 3586 E46B 3810",