internal/asm/f32,f64: remove old go version build tags
MODIFY
internal/asm/f32/ge_amd64.go
internal/asm/f32/ge_amd64.go
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-//+build go1.8,!noasm,!appengine
+//+build !noasm,!appengine
package f32

MODIFY
internal/asm/f32/ge_amd64.s
internal/asm/f32/ge_amd64.s
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-//+build go1.8,!noasm,!appengine
+//+build !noasm,!appengine
#include "textflag.h"

MODIFY
internal/asm/f32/ge_noasm.go
internal/asm/f32/ge_noasm.go
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-//+build !go1.8 !amd64 noasm appengine
+//+build !amd64 noasm appengine
package f32

MODIFY
internal/asm/f32/ge_test.go
internal/asm/f32/ge_test.go
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-// +build go1.7
-
package f32
import (

MODIFY
internal/asm/f64/ge_noasm.go
internal/asm/f64/ge_noasm.go
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-//+build !go1.8 !amd64 noasm appengine
+//+build !amd64 noasm appengine
package f64

internal/asm/f32,f64: remove old go version build tags