pkg/namesgenerator: remove names-generator binary

This binary was added in 0800650665, but no motivation,
other than "this could be nice". Searching if it's used by anyone, I found only
two occurrences, both of which were just examples, or indexing results;

- eae845e40e/tree-examples/docker.txt (L1229)
- 8b1e0b89c7/sync/cache/librariesioGoGo.json (L2200)

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

pkg/namesgenerator/cmd/names-generator/main.go

@@ -1,14 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"math/rand"
-	"time"
-
-	"github.com/docker/docker/pkg/namesgenerator"
-)
-
-func main() {
-	rand.Seed(time.Now().UnixNano())
-	fmt.Println(namesgenerator.GetRandomName(0))
-}