Remove validate.py main()

Since Ic626bd444e888c52bd9f350cc49d3529bb145ee2, transform.py -n does
everything validate.py's main() did, and more.  Remove validate.py's
main() and its invocation from the 'validate' tox job.

Change-Id: Ib0abf2cf9337f46650662f7a98549ab7d18ac5e2

tox.ini

@@ -13,7 +13,6 @@ deps = -r{toxinidir}/requirements.txt
 [testenv:validate]
 deps = jsonschema
 commands =
-  python validate.py
   python transform.py -n
 
 [testenv:publish]

validate.py

@@ -13,11 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import json
-import sys
-
 import jsonschema
-import yaml
 
 
 def validate_schema(schema, data, resolver=None):
@@ -63,12 +59,3 @@ def validate_all(schema, data, resolver=None):
         print(msg)
         ret = False
     return ret
-
-
-def main():
-    schema = json.load(open('schema.json', 'r'))
-    data = yaml.load(open('service-types.yaml', 'r'))
-    return int(not validate_all(schema, data))
-
-if __name__ == '__main__':
-    sys.exit(main())