refactor: group uuid instead of index

internal/number/number_test.go

@@ -31,10 +31,3 @@ func TestFixed(t *testing.T) {
 		})
 	}
 }
-
-func TestMax(t *testing.T) {
-	assert.Equal(t, 10., Max(9., 10.))
-	assert.Equal(t, 11., Max(11., 10.))
-	assert.Equal(t, 0, Max(-1, 0))
-	assert.Equal(t, 1, Max(1, 0))
-}