Fix linter err checks

Author: fbockaj

types/logger.go

@@ -35,29 +35,29 @@ func (sl *SyncLogger) Debug(format string, v ...interface{}) {
 	sl.Lock()
 	defer sl.Unlock()
 	taggedFormat := fmt.Sprintf("[DEBUG] signctrl: %v", format)
-	sl.logger.Output(2, fmt.Sprintf(taggedFormat, v...))
+	_ = sl.logger.Output(2, fmt.Sprintf(taggedFormat, v...))
 }
 
 // Info calls sl.Output to print an info message to the logger.
 func (sl *SyncLogger) Info(format string, v ...interface{}) {
 	sl.Lock()
 	defer sl.Unlock()
 	taggedFormat := fmt.Sprintf("[INFO] signctrl: %v", format)
-	sl.logger.Output(2, fmt.Sprintf(taggedFormat, v...))
+	_ = sl.logger.Output(2, fmt.Sprintf(taggedFormat, v...))
 }
 
 // Warn calls sl.Output to print a warning message to the logger.
 func (sl *SyncLogger) Warn(format string, v ...interface{}) {
 	sl.Lock()
 	defer sl.Unlock()
 	taggedFormat := fmt.Sprintf("[WARN] signctrl: %v", format)
-	sl.logger.Output(2, fmt.Sprintf(taggedFormat, v...))
+	_ = sl.logger.Output(2, fmt.Sprintf(taggedFormat, v...))
 }
 
 // Error calls sl.Output to print an error message to the logger.
 func (sl *SyncLogger) Error(format string, v ...interface{}) {
 	sl.Lock()
 	defer sl.Unlock()
 	taggedFormat := fmt.Sprintf("[ERR] signctrl: %v", format)
-	sl.logger.Output(2, fmt.Sprintf(taggedFormat, v...))
+	_ = sl.logger.Output(2, fmt.Sprintf(taggedFormat, v...))
 }