Remove unused packages from vendor.json (#5079)

vendor/vendor.json

@@ -284,12 +284,6 @@
 			"revision": "50761b0867bd1d9d069276790bcd4a3bccf2324a",
 			"revisionTime": "2016-08-31T22:25:20Z"
 		},
-		{
-			"checksumSHA1": "isRGvFzUCh72bNQFmw7WQaeT7xY=",
-			"path": "github.com/lox/httpcache",
-			"revision": "fff585cf25b80f4ccc4ac7be6d3f564aa9c117ff",
-			"revisionTime": "2017-01-09T03:46:36Z"
-		},
 		{
 			"path": "github.com/mattn/go-colorable",
 			"revision": "9056b7a9f2d1f2d96498d6d146acd1f9d5ed3d59",
@@ -301,12 +295,6 @@
 			"revision": "30a891c33c7cde7b02a981314b4228ec99380cca",
 			"revisionTime": "2016-11-23T14:36:37Z"
 		},
-		{
-			"checksumSHA1": "4gphCNVXIjp5ytz3+S3SD3Dp948=",
-			"path": "github.com/minio/blake2b-simd",
-			"revision": "3f5f724cb5b182a5c278d6d3d55b40e7f8c2efb4",
-			"revisionTime": "2016-07-23T06:10:19Z"
-		},
 		{
 			"checksumSHA1": "1EiU/fWJI6ldCTGorUvijilegRM=",
 			"path": "github.com/minio/blazer/base",
@@ -454,12 +442,6 @@
 			"revision": "c78aac22bd43883fd2817833b982153dcac17b3b",
 			"revisionTime": "2016-05-18T16:56:57+10:00"
 		},
-		{
-			"checksumSHA1": "NLwKGa5B0STKAvQV+lz/ujnbzN4=",
-			"path": "github.com/rainycape/vfs",
-			"revision": "a62fd22bcf7010946a44f6a1250a82c03110a14b",
-			"revisionTime": "2015-06-11T13:38:00Z"
-		},
 		{
 			"path": "github.com/rs/cors",
 			"revision": "a62a804a8a009876ca59105f7899938a1349f4b3",
@@ -859,18 +841,6 @@
 			"revision": "bd61cae2be85fa6ff40eb23dcdd24567967ac2ae",
 			"revisionTime": "2016-08-30T13:25:53Z"
 		},
-		{
-			"checksumSHA1": "lLdKOn9RPtFoTtPUNq5+sIInAiE=",
-			"path": "gopkg.in/olivere/elastic.v3/backoff",
-			"revision": "f7ae701daf3abe5dfb99f57b3f47738ec93c9c26",
-			"revisionTime": "2016-07-16T10:42:39Z"
-		},
-		{
-			"checksumSHA1": "XQg6xG6l15Ke43KolthYYnVDCYo=",
-			"path": "gopkg.in/olivere/elastic.v3/uritemplates",
-			"revision": "f7ae701daf3abe5dfb99f57b3f47738ec93c9c26",
-			"revisionTime": "2016-07-16T10:42:39Z"
-		},
 		{
 			"checksumSHA1": "ji4KugVW5dIfKLoFr1fE+3mT90A=",
 			"path": "gopkg.in/olivere/elastic.v5",