pref: use std lib for trimming

Author: GihanSoft

src/NaturalStringComparer/NaturalComparer.cs

@@ -119,8 +119,8 @@ private static ReadOnlySpan<char> GetNumber(ReadOnlySpan<char> span, out ReadOnl
 
     private static int CompareNumValues(ReadOnlySpan<char> numValue1, ReadOnlySpan<char> numValue2)
     {
-        var num1AsSpan = TrimZero(numValue1);
-        var num2AsSpan = TrimZero(numValue2);
+        var num1AsSpan = numValue1.TrimStart('0');
+        var num2AsSpan = numValue2.TrimStart('0');
 
         if (num1AsSpan.Length < num2AsSpan.Length)
         {
@@ -146,14 +146,4 @@ private static int CompareNumValues(ReadOnlySpan<char> numValue1, ReadOnlySpan<c
 
         return numValue2.Length < numValue1.Length ? -1 : 1; // "033" < "33" === true
     }
-
-    private static ReadOnlySpan<char> TrimZero(ReadOnlySpan<char> numValue)
-    {
-        while (numValue.Length > 0 && numValue[0] == '0')
-        {
-            numValue = numValue.Slice(1);
-        }
-
-        return numValue;
-    }
 }