Get rid of unused func

Signed-off-by: Matt Lord <mattalord@gmail.com>

go/mysql/binlog/binlog_json.go

@@ -471,45 +471,3 @@ func binparserObject(typ jsonDataType, data []byte, pos int) (node *json.Value,
 
 	return json.NewObject(object), nil
 }
-
-func readLenEncInt(data []byte, pos int) (uint64, int, bool) {
-	if pos >= len(data) {
-		return 0, 0, false
-	}
-
-	// reslice to avoid arithmetic below
-	data = data[pos:]
-
-	switch data[0] {
-	case 0xfc:
-		// Encoded in the next 2 bytes.
-		if 2 >= len(data) {
-			return 0, 0, false
-		}
-		return uint64(data[1]) |
-			uint64(data[2])<<8, pos + 3, true
-	case 0xfd:
-		// Encoded in the next 3 bytes.
-		if 3 >= len(data) {
-			return 0, 0, false
-		}
-		return uint64(data[1]) |
-			uint64(data[2])<<8 |
-			uint64(data[3])<<16, pos + 4, true
-	case 0xfe:
-		// Encoded in the next 8 bytes.
-		if 8 >= len(data) {
-			return 0, 0, false
-		}
-		return uint64(data[1]) |
-			uint64(data[2])<<8 |
-			uint64(data[3])<<16 |
-			uint64(data[4])<<24 |
-			uint64(data[5])<<32 |
-			uint64(data[6])<<40 |
-			uint64(data[7])<<48 |
-			uint64(data[8])<<56, pos + 9, true
-	default:
-		return uint64(data[0]), pos + 1, true
-	}
-}