PackageHeaderEmitter: output goog.require() for externs because release builds fail without it
diff --git a/compiler-jx/src/main/java/org/apache/royale/compiler/internal/codegen/js/jx/PackageHeaderEmitter.java b/compiler-jx/src/main/java/org/apache/royale/compiler/internal/codegen/js/jx/PackageHeaderEmitter.java
index 7c8b9ac..57cfc76 100644
--- a/compiler-jx/src/main/java/org/apache/royale/compiler/internal/codegen/js/jx/PackageHeaderEmitter.java
+++ b/compiler-jx/src/main/java/org/apache/royale/compiler/internal/codegen/js/jx/PackageHeaderEmitter.java
@@ -380,9 +380,6 @@
 
                 if (imp.equals(cname))
                     continue;
-
-                if (project.sourceExterns.contains(imp))
-                	continue;
                 
                 if (NativeUtils.isNative(imp))
                 {