[ci] fix: go-fmt fails on master branch (#6906)

agent/structs/structs.go

@@ -322,7 +322,6 @@ func (r *DeregisterRequest) RequestDatacenter() string {
 	return r.Datacenter
 }
 
-
 func (r *DeregisterRequest) UnmarshalJSON(data []byte) error {
 	type Alias DeregisterRequest
 	aux := &struct {
@@ -331,14 +330,13 @@ func (r *DeregisterRequest) UnmarshalJSON(data []byte) error {
 	}{
 		Alias: (*Alias)(r),
 	}
-	
+
 	if err := lib.UnmarshalJSON(data, &aux); err != nil {
 		return err
 	}
 	return nil
 }
 
-
 // QuerySource is used to pass along information about the source node
 // in queries so that we can adjust the response based on its network
 // coordinates.