feat: Remove unnecessary OK header

Author: codingconcepts

README.md

@@ -83,4 +83,6 @@ func midLog2(n errhandler.Wrap) errhandler.Wrap {
 func addProduct(w http.ResponseWriter, r *http.Request) error {
   ...
 }
-```
+```
+
+

errhandler.go

@@ -24,7 +24,6 @@ func (fn Wrap) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 // SendJSON returns a JSON response to the caller, or fails with an error.
 func SendJSON(w http.ResponseWriter, data interface{}) error {
 	w.Header().Set("Content-Type", "application/json")
-	w.WriteHeader(http.StatusOK)
 	if err := json.NewEncoder(w).Encode(data); err != nil {
 		return err
 	}
@@ -34,7 +33,6 @@ func SendJSON(w http.ResponseWriter, data interface{}) error {
 // SendString returns a string response to the caller, or fails with an error.
 func SendString(w http.ResponseWriter, message string) error {
 	w.Header().Set("Content-Type", "text/plain")
-	w.WriteHeader(http.StatusOK)
 	if _, err := w.Write([]byte(message)); err != nil {
 		return err
 	}