Remove port validation from edge syslog config

validateSinglePort() validates a string value and therefore unsuitable
for use in this case.
NSX will validate the port in any case.

Fixes: #1186

nsxt/resource_nsxt_edge_transport_node.go

@@ -388,11 +388,10 @@ func getEdgeNodeSettingsSchema() *schema.Schema {
 								Optional:    true,
 							},
 							"port": {
-								Type:         schema.TypeInt,
-								Optional:     true,
-								Default:      514,
-								ValidateFunc: validateSinglePort(),
-								Description:  "Syslog server port",
+								Type:        schema.TypeInt,
+								Optional:    true,
+								Default:     514,
+								Description: "Syslog server port",
 							},
 							"protocol": {
 								Type:         schema.TypeString,