replace hpcloud/tail with nxadm/tail

The hpcloud is not maintained anymore.  nxadm is already part of the
dependency chain, so it won't add work for downstream packages.

While testing upcoming changes to the events-file backend, I noticed
that nxadm is shipping required fixes.

[NO NEW TESTS NEEDED]

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

1 files changed, 0 insertions, 36 deletions

diff --git a/vendor/github.com/hpcloud/tail/watch/filechanges.go b/vendor/github.com/hpcloud/tail/watch/filechanges.go
deleted file mode 100644
index 3ce5dcecb..000000000
--- a/vendor/github.com/hpcloud/tail/watch/filechanges.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package watch
-
-type FileChanges struct {
-	Modified  chan bool // Channel to get notified of modifications
-	Truncated chan bool // Channel to get notified of truncations
-	Deleted   chan bool // Channel to get notified of deletions/renames
-}
-
-func NewFileChanges() *FileChanges {
-	return &FileChanges{
-		make(chan bool), make(chan bool), make(chan bool)}
-}
-
-func (fc *FileChanges) NotifyModified() {
-	sendOnlyIfEmpty(fc.Modified)
-}
-
-func (fc *FileChanges) NotifyTruncated() {
-	sendOnlyIfEmpty(fc.Truncated)
-}
-
-func (fc *FileChanges) NotifyDeleted() {
-	sendOnlyIfEmpty(fc.Deleted)
-}
-
-// sendOnlyIfEmpty sends on a bool channel only if the channel has no
-// backlog to be read by other goroutines. This concurrency pattern
-// can be used to notify other goroutines if and only if they are
-// looking for it (i.e., subsequent notifications can be compressed
-// into one).
-func sendOnlyIfEmpty(ch chan bool) {
-	select {
-	case ch <- true:
-	default:
-	}
-}