libs/rand: remove custom seed function (#7473)

libs/rand/random.go

@@ -1,9 +1,6 @@
 package rand
 
 import (
-	crand "crypto/rand"
-	"encoding/binary"
-	"fmt"
 	mrand "math/rand"
 )
 
@@ -11,37 +8,6 @@ const (
 	strChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" // 62 characters
 )
 
-func init() {
-	Reseed()
-}
-
-// NewRand returns a prng, that is seeded with OS randomness.
-// The OS randomness is obtained from crypto/rand, however, like with any math/rand.Rand
-// object none of the provided methods are suitable for cryptographic usage.
-//
-// Note that the returned instance of math/rand's Rand is not
-// suitable for concurrent use by multiple goroutines.
-//
-// For concurrent use, call Reseed to reseed math/rand's default source and
-// use math/rand's top-level convenience functions instead.
-func NewRand() *mrand.Rand {
-	seed := crandSeed()
-	// nolint:gosec // G404: Use of weak random number generator
-	return mrand.New(mrand.NewSource(seed))
-}
-
-// Reseed conveniently re-seeds the default Source of math/rand with
-// randomness obtained from crypto/rand.
-//
-// Note that this does not make math/rand suitable for cryptographic usage.
-//
-// Use math/rand's top-level convenience functions remain suitable
-// for concurrent use by multiple goroutines.
-func Reseed() {
-	seed := crandSeed()
-	mrand.Seed(seed)
-}
-
 // Str constructs a random alphanumeric string of given length
 // from math/rand's global default Source.
 func Str(length int) string {
@@ -78,12 +44,3 @@ func Bytes(n int) []byte {
 	}
 	return bs
 }
-
-func crandSeed() int64 {
-	var seed int64
-	err := binary.Read(crand.Reader, binary.BigEndian, &seed)
-	if err != nil {
-		panic(fmt.Sprintf("could nor read random seed from crypto/rand: %v", err))
-	}
-	return seed
-}