Update requests.go

Remove key pair stuff...
diff --git a/openstack/compute/v2/servers/requests.go b/openstack/compute/v2/servers/requests.go
index c2dca7e..ed35b33 100644
--- a/openstack/compute/v2/servers/requests.go
+++ b/openstack/compute/v2/servers/requests.go
@@ -135,9 +135,6 @@
 	// AdminPass [optional] sets the root user password. If not set, a randomly-generated
 	// password will be created and returned in the response.
 	AdminPass string
-
-	//KeyName [optional] sets key pair name to be used
-	KeyName string
 }
 
 // ToServerCreateMap assembles a request body based on the contents of a CreateOpts.
@@ -168,9 +165,6 @@
 	if opts.AdminPass != "" {
 		server["adminPass"] = opts.AdminPass
 	}
-	if opts.KeyName != "" {
-		server["key_name"] = opts.KeyName
-	}
 
 	if len(opts.SecurityGroups) > 0 {
 		securityGroups := make([]map[string]interface{}, len(opts.SecurityGroups))