Remove unit folder from previous error

unit/length/length.go

@@ -1,32 +0,0 @@
-package unit
-
-// Length units
-
-// Represents a length in meters
-type Length float64
-
-const (
-	Meter      Length = 1.0
-	Centimeter Length = 0.01
-	Foot       Length = 0.3048
-	Furlong    Length = 600 * Foot
-	Yard       Length = 3 * Foot
-	Mile       Length = 5280 * Foot
-	Inch       Length = 1.0 / 12 * Foot
-	Smoot      Length = 67.0 / 12 * Foot
-	Au         Length = 149597870700
-	LightYear  Length = 9460730472580800
-)
-
-func (l Length) Unit() *Unit {
-	return CreateUnit(float64(l), &Dimensions{Length: 1})
-}
-
-func (l Length) In(l2 Length) float64 {
-	return float64(l) / float64(l2)
-}
-
-// So it can implement a lengther interface
-func (l Length) Length() Length {
-	return l
-}