Merge pull request #15279 from Snuffleupagus/firefox-rm-README

Remove the `extensions/firefox/README.mozilla` file (bug 1778567 follow-up)

gulpfile.js

@@ -1266,7 +1266,6 @@ gulp.task(
  const MOZCENTRAL_DIR = BUILD_DIR + "mozcentral/",
  MOZCENTRAL_EXTENSION_DIR = MOZCENTRAL_DIR + "browser/extensions/pdfjs/",
  MOZCENTRAL_CONTENT_DIR = MOZCENTRAL_EXTENSION_DIR + "content/",
- FIREFOX_EXTENSION_DIR = "extensions/firefox/",
  MOZCENTRAL_L10N_DIR =
  MOZCENTRAL_DIR + "browser/locales/en-US/pdfviewer/",
  FIREFOX_CONTENT_DIR = EXTENSION_SRC_DIR + "/firefox/content/";
@@ -1279,10 +1278,6 @@ gulp.task(
  // Clear out everything in the firefox extension build directory
  rimraf.sync(MOZCENTRAL_DIR);
 
- const versionJSON = getVersionJSON();
- const version = versionJSON.version,
- commit = versionJSON.commit;
-
  return merge([
  createMainBundle(defines).pipe(
  gulp.dest(MOZCENTRAL_CONTENT_DIR + "build")
@@ -1325,11 +1320,6 @@ gulp.task(
  gulp
  .src("l10n/en-US/*.properties")
  .pipe(gulp.dest(MOZCENTRAL_L10N_DIR)),
- gulp
- .src(FIREFOX_EXTENSION_DIR + "README.mozilla")
- .pipe(replace(/\bPDFJSSCRIPT_VERSION\b/g, version))
- .pipe(replace(/\bPDFJSSCRIPT_COMMIT\b/g, commit))
- .pipe(gulp.dest(MOZCENTRAL_EXTENSION_DIR)),
  gulp.src("LICENSE").pipe(gulp.dest(MOZCENTRAL_EXTENSION_DIR)),
  gulp
  .src(FIREFOX_CONTENT_DIR + "PdfJsDefaultPreferences.jsm")