rtsp: add random value to timestamp of tracks from other protocols (#3071)

internal/formatprocessor/processor.go

@@ -10,14 +10,6 @@ import (
 	"github.com/bluenviron/mediamtx/internal/unit"
 )
 
-// avoid an int64 overflow and preserve resolution by splitting division into two parts:
-// first add the integer part, then the decimal part.
-func multiplyAndDivide(v, m, d time.Duration) time.Duration {
-	secs := v / d
-	dec := v % d
-	return (secs*m + dec*m/d)
-}
-
 // Processor cleans and normalizes streams.
 type Processor interface {
 	// process a Unit.