Bug 1158356 Remove sdk/deprecated/symbiont

lib/sdk/content/content-worker.js

@@ -110,7 +110,7 @@ Object.freeze({
   injectTimers: function injectTimers(exports, chromeAPI, pipe, console) {
     // wrapped functions from `'timer'` module.
     // Wrapper adds `try catch` blocks to the callbacks in order to
-    // emit `error` event on a symbiont if exception is thrown in
+    // emit `error` event if exception is thrown in
     // the Worker global scope.
     // @see http://www.w3.org/TR/workers/#workerutils
 

lib/sdk/content/content.js

@@ -9,22 +9,14 @@ module.metadata = {
 
 const { deprecateUsage } = require('../util/deprecate');
 
-Object.defineProperty(exports, "Loader", { 
+Object.defineProperty(exports, "Loader", {
   get: function() {
     deprecateUsage('`sdk/content/content` is deprecated. Please use `sdk/content/loader` directly.');
     return require('./loader').Loader;
   }
 });
 
-Object.defineProperty(exports, "Symbiont", { 
-  get: function() {
-    deprecateUsage('Both `sdk/content/content` and `sdk/deprecated/symbiont` are deprecated. ' +
-                   '`sdk/core/heritage` supersedes Symbiont for inheritance.');
-    return require('../deprecated/symbiont').Symbiont;
-  }
-});
-
-Object.defineProperty(exports, "Worker", { 
+Object.defineProperty(exports, "Worker", {
   get: function() {
     deprecateUsage('`sdk/content/content` is deprecated. Please use `sdk/content/worker` directly.');
     return require('./worker').Worker;

lib/sdk/deprecated/sync-worker.js

@@ -90,7 +90,7 @@ const Worker = Class({
    * argument, which represents data to be sent to the worker. The data may
    * be any primitive type value or `JSON`. Call of this method asynchronously
    * emits `message` event with data value in the global scope of this
-   * symbiont.
+   * worker.
    *
    * `message` event listeners can be set either by calling
    * `self.on` with a first argument string `"message"` or by