Removed unnecessary conversions (#7557)

No need to convert to the same type.

modules/log/writer.go

@@ -203,7 +203,7 @@ func (logger *WriterLogger) createMsg(buf *[]byte, event *Event) {
 	(&protectedANSIWriter{
 		w:    &baw,
 		mode: pawMode,
-	}).Write([]byte(msg))
+	}).Write(msg)
 	*buf = baw
 
 	if event.stacktrace != "" && logger.StacktraceLevel <= event.level {