cmd/gomobile: remove note about incomplete support on iOS

While the gomobile project itself is experimental, the iOS support
is just as "complete" as the Android ditto. Remove the special note
for iOS.

Change-Id: I624a29340ee453f3a54e6f8dc75203a03681df66
Reviewed-on: https://go-review.googlesource.com/135435
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/cmd/gomobile/build.go b/cmd/gomobile/build.go
index 727a7c7..a41e581 100644
--- a/cmd/gomobile/build.go
+++ b/cmd/gomobile/build.go
@@ -42,7 +42,7 @@
 -target=android/arm,android/386.
 
 For -target ios, gomobile must be run on an OS X machine with Xcode
-installed. Support is not complete.
+installed.
 
 If the package directory contains an assets subdirectory, its contents
 are copied into the output.
diff --git a/cmd/gomobile/doc.go b/cmd/gomobile/doc.go
index e30c6f8..7b479c8 100644
--- a/cmd/gomobile/doc.go
+++ b/cmd/gomobile/doc.go
@@ -98,7 +98,7 @@
 -target=android/arm,android/386.
 
 For -target ios, gomobile must be run on an OS X machine with Xcode
-installed. Support is not complete.
+installed.
 
 If the package directory contains an assets subdirectory, its contents
 are copied into the output.