Revert "Dependency updates. (#14033)" (#14304)

This reverts commit f14c79f170.

vendor/github.com/mailru/easyjson/helpers.go

@@ -26,16 +26,6 @@ type Optional interface {
 	IsDefined() bool
 }
 
-// UnknownsUnmarshaler provides a method to unmarshal unknown struct fileds and save them as you want
-type UnknownsUnmarshaler interface {
-	UnmarshalUnknown(in *jlexer.Lexer, key string)
-}
-
-// UnknownsMarshaler provides a method to write additional struct fields
-type UnknownsMarshaler interface {
-	MarshalUnknowns(w *jwriter.Writer, first bool)
-}
-
 // Marshal returns data as a single byte slice. Method is suboptimal as the data is likely to be copied
 // from a chain of smaller chunks.
 func Marshal(v Marshaler) ([]byte, error) {