Revert "Commit updated Javascript packages"

This reverts commit a88734348a.

build/javascript/node_modules/mux.js/lib/tools/parse-sample-flags.js

@@ -1,13 +0,0 @@
-var parseSampleFlags = function(flags) {
-  return {
-    isLeading: (flags[0] & 0x0c) >>> 2,
-    dependsOn: flags[0] & 0x03,
-    isDependedOn: (flags[1] & 0xc0) >>> 6,
-    hasRedundancy: (flags[1] & 0x30) >>> 4,
-    paddingValue: (flags[1] & 0x0e) >>> 1,
-    isNonSyncSample: flags[1] & 0x01,
-    degradationPriority: (flags[2] << 8) | flags[3]
-  };
-};
-
-module.exports = parseSampleFlags;