chore: remove some dead code

batch.go

 package datastore
 
-type verb int
-
 type op struct {
 	delete bool
 	value  []byte

key_test.go

@@ -2,7 +2,6 @@ package datastore_test
 
 import (
 	"bytes"
-	"math/rand"
 	"path"
 	"strings"
 	"testing"
@@ -14,16 +13,6 @@ import (
 // Hook up gocheck into the "go test" runner.
 func Test(t *testing.T) { TestingT(t) }
 
-func randomString() string {
-	chars := "abcdefghijklmnopqrstuvwxyz1234567890"
-	var buf bytes.Buffer
-	l := rand.Intn(50)
-	for j := 0; j < l; j++ {
-		buf.WriteByte(chars[rand.Intn(len(chars))])
-	}
-	return buf.String()
-}
-
 type KeySuite struct{}
 
 var _ = Suite(&KeySuite{})

query/filter_test.go

@@ -5,12 +5,6 @@ import (
 	"testing"
 )
 
-type filterTestCase struct {
-	filter Filter
-	keys   []string
-	expect []string
-}
-
 func testKeyFilter(t *testing.T, f Filter, keys []string, expect []string) {
 	e := make([]Entry, len(keys))
 	for i, k := range keys {

query/order_test.go

@@ -5,12 +5,6 @@ import (
 	"testing"
 )
 
-type orderTestCase struct {
-	order  Order
-	keys   []string
-	expect []string
-}
-
 func testKeyOrder(t *testing.T, f Order, keys []string, expect []string) {
 	e := make([]Entry, len(keys))
 	for i, k := range keys {