filer: remove replication, collection, disk_type info from entry metadata

these metadata can change and are not used

weed/filer/read_write.go

@@ -53,12 +53,10 @@ func SaveInsideFiler(client filer_pb.SeaweedFilerClient, dir, name string, conte
 				Name:        name,
 				IsDirectory: false,
 				Attributes: &filer_pb.FuseAttributes{
-					Mtime:       time.Now().Unix(),
-					Crtime:      time.Now().Unix(),
-					FileMode:    uint32(0644),
-					Collection:  "",
-					Replication: "",
-					FileSize:    uint64(len(content)),
+					Mtime:    time.Now().Unix(),
+					Crtime:   time.Now().Unix(),
+					FileMode: uint32(0644),
+					FileSize: uint64(len(content)),
 				},
 				Content: content,
 			},