tape: Remove GBEU

tape/measure.go

@@ -1,15 +1,5 @@
 package tape
 
-// GBEUSize returns the size (in octets) of a GBEU integer.
-func GBEUSize(value uint64) int {
-	length := 0
-	for {
-		value >>= 7
-		length ++
-		if value == 0 { return length }
-	}
-}
-
 // IntBytes returns the number of bytes required to hold a given unsigned
 // integer.
 func IntBytes(value uint64) int {