small refactor

src/commonMain/kotlin/com/infendro/encoding/util/Math.kt

@@ -4,10 +4,7 @@ import kotlin.math.log2
 
 internal fun log2(
     value: Int,
-): Double {
+) = log2(value.toDouble())
-    val x = value.toDouble()
-    return log2(x)
-}
 
 internal fun gcd(
     a: Int,