Remove unused constant
This was left over from a previous modification that retried
sending email messages.
@@ -45,7 +45,6 @@ from google.appengine.api import apiproxy_stub
MAX_REQUEST_SIZE = 32 << 20
-MAX_RETRIES = 5
class MailServiceStub(apiproxy_stub.APIProxyStub):
"""Python only mail service stub.
