jsoniter: replace github.com/modern-go/concurrent with sync

Author: BenTheElder

Diff for: go.mod

@@ -3,7 +3,6 @@ module sigs.k8s.io/structured-merge-diff/v6
 require (
 	github.com/davecgh/go-spew v1.1.1
 	github.com/google/go-cmp v0.5.9
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd
 	github.com/modern-go/reflect2 v1.0.2
 	github.com/stretchr/testify v1.3.0
 	sigs.k8s.io/randfill v0.0.0-20250304075658-069ef1bbf016

Diff for: go.sum

@@ -3,8 +3,6 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
-github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=

Diff for: internal/third_party/jsoniter/config.go

@@ -7,7 +7,6 @@ import (
 	"sync"
 	"unsafe"
 
-	"github.com/modern-go/concurrent"
 	"github.com/modern-go/reflect2"
 )
 
@@ -72,8 +71,8 @@ type frozenConfig struct {
 	objectFieldMustBeSimpleString bool
 	onlyTaggedField               bool
 	disallowUnknownFields         bool
-	decoderCache                  *concurrent.Map
-	encoderCache                  *concurrent.Map
+	decoderCache                  sync.Map
+	encoderCache                  sync.Map
 	encoderExtension              Extension
 	decoderExtension              Extension
 	extraExtensions               []Extension
@@ -83,8 +82,8 @@ type frozenConfig struct {
 }
 
 func (cfg *frozenConfig) initCache() {
-	cfg.decoderCache = concurrent.NewMap()
-	cfg.encoderCache = concurrent.NewMap()
+	cfg.decoderCache = sync.Map{}
+	cfg.encoderCache = sync.Map{}
 }
 
 func (cfg *frozenConfig) addDecoderToCache(cacheKey uintptr, decoder ValDecoder) {
@@ -111,7 +110,7 @@ func (cfg *frozenConfig) getEncoderFromCache(cacheKey uintptr) ValEncoder {
 	return nil
 }
 
-var cfgCache = concurrent.NewMap()
+var cfgCache = sync.Map{}
 
 func getFrozenConfigFromCache(cfg Config) *frozenConfig {
 	obj, found := cfgCache.Load(cfg)