all: remove the build tag

Updates #1415

audio/error_ios.go

@@ -12,9 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios
-// +build ios
-
 package audio
 
 // #cgo CFLAGS: -x objective-c

cmd/ebitenmobile/gobind.go

@@ -138,9 +138,6 @@ import "C"`); err != nil {
 
 const objcM = `// Code generated by ebitenmobile. DO NOT EDIT.
 
-//go:build ios
-// +build ios
-
 #import <TargetConditionals.h>
 
 #import <stdint.h>

internal/devicescale/impl_ios.go

@@ -12,9 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios
-// +build ios
-
 package devicescale
 
 // #cgo CFLAGS: -x objective-c

internal/gamepad/api_ios.go

@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios && !nintendosdk
-// +build ios,!nintendosdk
+//go:build !nintendosdk
+// +build !nintendosdk
 
 package gamepad
 

internal/gamepad/gamepad_ios.go

@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios && !nintendosdk
-// +build ios,!nintendosdk
+//go:build !nintendosdk
+// +build !nintendosdk
 
 package gamepad
 

internal/graphicsdriver/metal/view_ios.go

@@ -12,9 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios
-// +build ios
-
 package metal
 
 // Suppress the warnings about availability guard with -Wno-unguarded-availability-new.

internal/ui/ui_ios.go

@@ -12,9 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios
-// +build ios
-
 package ui
 
 import (

internal/vibrate/vibrate_ios.go

@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios && !nintendosdk
-// +build ios,!nintendosdk
+//go:build !nintendosdk
+// +build !nintendosdk
 
 package vibrate
 

mobile/ebitenmobileview/input_ios.go

@@ -12,9 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios
-// +build ios
-
 package ebitenmobileview
 
 import (

mobile/ebitenmobileview/view_ios.go

@@ -12,9 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios
-// +build ios
-
 package ebitenmobileview
 
 import (