fix sky_apk reference

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 10c7483ac759d7e9e75a4f95b9c6c7adc7ce82dd..620cfe84b47c735a571bcf054fa26dbf013cade1 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -27,14 +27,9 @@ group("default") {
   }
 
   if (is_ios) {
-    deps = []
     deps = [
       "//sky/shell",
-
-      # TODO(csg): This target builds the testonly dependencies that allow
-      # running a local instance of Sky server. Needs to to be renamed to not
-      # imply Android specific behavior
-      "//sky:sky_apk",
+      "//sky:sky_dev",
     ]
   }
 }