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

This reverts commit f14c79f170.

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

@@ -1,34 +0,0 @@
-package easyjson
-
-import (
-	json "encoding/json"
-
-	jlexer "github.com/mailru/easyjson/jlexer"
-	"github.com/mailru/easyjson/jwriter"
-)
-
-// UnknownFieldsProxy implemets UnknownsUnmarshaler and UnknownsMarshaler
-// use it as embedded field in your structure to parse and then serialize unknown struct fields
-type UnknownFieldsProxy struct {
-	unknownFields map[string]interface{}
-}
-
-func (s *UnknownFieldsProxy) UnmarshalUnknown(in *jlexer.Lexer, key string) {
-	if s.unknownFields == nil {
-		s.unknownFields = make(map[string]interface{}, 1)
-	}
-	s.unknownFields[key] = in.Interface()
-}
-
-func (s UnknownFieldsProxy) MarshalUnknowns(out *jwriter.Writer, first bool) {
-	for key, val := range s.unknownFields {
-		if first {
-			first = false
-		} else {
-			out.RawByte(',')
-		}
-		out.String(string(key))
-		out.RawByte(':')
-		out.Raw(json.Marshal(val))
-	}
-}