all: delete aliastypeparams GOEXPERIMENT

Always enable aliastypeparams and remove the GOEXPERIMENT.

Change-Id: Ic38fe25b0bba312a7f83f7bb94b57ab75ce0f0c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/691956
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Mark Freeman <markfreeman@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

7 files changed, 6 insertions, 28 deletions

diff --git a/src/internal/buildcfg/exp.go b/src/internal/buildcfg/exp.go
index df84e9fdf4..310226bc01 100644
--- a/src/internal/buildcfg/exp.go
+++ b/src/internal/buildcfg/exp.go
@@ -79,10 +79,9 @@ func ParseGOEXPERIMENT(goos, goarch, goexp string) (*ExperimentFlags, error) {
 	dwarf5Supported := (goos != "darwin" && goos != "ios" && goos != "aix")
 
 	baseline := goexperiment.Flags{
-		RegabiWrappers:  regabiSupported,
-		RegabiArgs:      regabiSupported,
-		AliasTypeParams: true,
-		Dwarf5:          dwarf5Supported,
+		RegabiWrappers: regabiSupported,
+		RegabiArgs:     regabiSupported,
+		Dwarf5:         dwarf5Supported,
 	}
 
 	// Start with the statically enabled set of experiments.
diff --git a/src/internal/goexperiment/exp_aliastypeparams_off.go b/src/internal/goexperiment/exp_aliastypeparams_off.go
deleted file mode 100644
index 620d34ec79..0000000000
--- a/src/internal/goexperiment/exp_aliastypeparams_off.go
+++ /dev/null
@@ -1,8 +0,0 @@
-// Code generated by mkconsts.go. DO NOT EDIT.
-
-//go:build !goexperiment.aliastypeparams
-
-package goexperiment
-
-const AliasTypeParams = false
-const AliasTypeParamsInt = 0
diff --git a/src/internal/goexperiment/exp_aliastypeparams_on.go b/src/internal/goexperiment/exp_aliastypeparams_on.go
deleted file mode 100644
index 8f6872cdcd..0000000000
--- a/src/internal/goexperiment/exp_aliastypeparams_on.go
+++ /dev/null
@@ -1,8 +0,0 @@
-// Code generated by mkconsts.go. DO NOT EDIT.
-
-//go:build goexperiment.aliastypeparams
-
-package goexperiment
-
-const AliasTypeParams = true
-const AliasTypeParamsInt = 1
diff --git a/src/internal/goexperiment/flags.go b/src/internal/goexperiment/flags.go
index dd7a4f446c..3144d3adfc 100644
--- a/src/internal/goexperiment/flags.go
+++ b/src/internal/goexperiment/flags.go
@@ -100,11 +100,6 @@ type Flags struct {
 	// inlining phase within the Go compiler.
 	NewInliner bool
 
-	// AliasTypeParams enables type parameters for alias types.
-	// Requires that gotypesalias=1 is set with GODEBUG.
-	// This flag will be removed with Go 1.25.
-	AliasTypeParams bool
-
 	// Synctest enables the testing/synctest package.
 	Synctest bool
 
diff --git a/src/internal/types/testdata/fixedbugs/issue67683.go b/src/internal/types/testdata/fixedbugs/issue67683.go
index f7c9bcdd01..c9ad5f6788 100644
--- a/src/internal/types/testdata/fixedbugs/issue67683.go
+++ b/src/internal/types/testdata/fixedbugs/issue67683.go
@@ -1,4 +1,4 @@
-// -goexperiment=aliastypeparams -gotypesalias=1
+// -gotypesalias=1
 
 // Copyright 2024 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/internal/types/testdata/fixedbugs/issue69576.go b/src/internal/types/testdata/fixedbugs/issue69576.go
index 97e03dfab4..fc436bbfd3 100644
--- a/src/internal/types/testdata/fixedbugs/issue69576.go
+++ b/src/internal/types/testdata/fixedbugs/issue69576.go
@@ -1,4 +1,4 @@
-// -goexperiment=aliastypeparams -gotypesalias=1
+// -gotypesalias=1
 
 // Copyright 2024 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/internal/types/testdata/spec/typeAliases1.23b.go b/src/internal/types/testdata/spec/typeAliases1.23b.go
index c92c3d3a7e..8a09899066 100644
--- a/src/internal/types/testdata/spec/typeAliases1.23b.go
+++ b/src/internal/types/testdata/spec/typeAliases1.23b.go
@@ -1,4 +1,4 @@
-// -lang=go1.23 -gotypesalias=1 -goexperiment=aliastypeparams
+// -lang=go1.23 -gotypesalias=1
 
 // Copyright 2024 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style