Remove test that doesn't match RFC 3339 duration grammar
Removing pending clariication in the JSON schema spec.
"data": "PT1M",
"valid": true
},
- {
- "description": "elements may be omitted if their value is zero",
- "data": "PT1H1S",
- "valid": true
- },
{
"description": "one and a half days, in hours",
"data": "PT36H",
