Merge pull request #15019 from mozilla/revert-15003-mc

Revert "Change the name of the generated pdf.sandbox.external for mozilla-central"

Author: calixteman

gulpfile.js

@@ -393,15 +393,12 @@ function createSandboxExternal(defines) {
     saveComments: false,
     defines,
   };
-  return gulp
-    .src("./src/pdf.sandbox.external.js")
-    .pipe(
-      transform("utf8", content => {
-        content = preprocessor2.preprocessPDFJSCode(ctx, content);
-        return `${licenseHeader}\n${content}`;
-      })
-    )
-    .pipe(rename("pdf.sandbox.external.jsm"));
+  return gulp.src("./src/pdf.sandbox.external.js").pipe(
+    transform("utf8", content => {
+      content = preprocessor2.preprocessPDFJSCode(ctx, content);
+      return `${licenseHeader}\n${content}`;
+    })
+  );
 }
 
 function createTemporaryScriptingBundle(defines, extraOptions = undefined) {