Remove the steps in Install that purge active workers early. Fixes #821.

Author: jungkees

spec/service_worker/index.html

@@ -2967,19 +2967,6 @@ <h1>Install</h1>
       <li>Run the <a href="#update-state-algorithm">Update State</a> algorithm passing <var>registration</var>'s <a href="#dfn-waiting-worker">waiting worker</a> and <em>installed</em> as the arguments.</li>
       <li>If <var>registration</var>'s <a href="#dfn-waiting-worker">waiting worker</a>'s <a href="#dfn-skip-waiting-flag">skip waiting flag</a> is set, then:
         <ol>
-          <li>For each <a href="#dfn-service-worker-client">service worker client</a> <var>serviceWorkerClient</var> whose <a href="https://html.spec.whatwg.org/multipage/webappapis.html#creation-url">creation url</a> <a href="#scope-match-algorithm">matches</a> <var>registration</var>'s <a href="#dfn-scope-url">scope url</a>:
-            <ol>
-              <li>Let <var>exitingWorker</var> be the <a href="#dfn-active-worker">active worker</a> that <a href="#dfn-control">controls</a> <var>serviceWorkerClient</var>.</li>
-              <li>If <var>exitingWorker</var> is not null, then:
-                <ol>
-                  <li>Wait for <var>exitingWorker</var> to finish handling any in-progress requests.
-                  </li>
-                  <li><a href="#terminate-service-worker-algorithm">Terminate</a> <var>exitingWorker</var>.</li>
-                  <li>Run the <a href="#update-state-algorithm">Update State</a> algorithm passing <var>exitingWorker</var> and <em>redundant</em> as the arguments.</li>
-                </ol>
-              </li>
-            </ol>
-          </li>
           <li>Run <a href="#activation-algorithm">Activate</a> algorithm, or its <a href="#dfn-processing-equivalence">equivalent</a>, passing <var>registration</var> as the argument.</li>
           <li>Invoke <a href="#finish-job-algorithm">Finish Job</a> with <var>job</var> and abort these steps.</li>
         </ol>

spec/service_worker_1/index.html

@@ -2965,19 +2965,6 @@ <h1>Install</h1>
       <li>Run the <a href="#update-state-algorithm">Update State</a> algorithm passing <var>registration</var>'s <a href="#dfn-waiting-worker">waiting worker</a> and <em>installed</em> as the arguments.</li>
       <li>If <var>registration</var>'s <a href="#dfn-waiting-worker">waiting worker</a>'s <a href="#dfn-skip-waiting-flag">skip waiting flag</a> is set, then:
         <ol>
-          <li>For each <a href="#dfn-service-worker-client">service worker client</a> <var>serviceWorkerClient</var> whose <a href="https://html.spec.whatwg.org/multipage/webappapis.html#creation-url">creation url</a> <a href="#scope-match-algorithm">matches</a> <var>registration</var>'s <a href="#dfn-scope-url">scope url</a>:
-            <ol>
-              <li>Let <var>exitingWorker</var> be the <a href="#dfn-active-worker">active worker</a> that <a href="#dfn-control">controls</a> <var>serviceWorkerClient</var>.</li>
-              <li>If <var>exitingWorker</var> is not null, then:
-                <ol>
-                  <li>Wait for <var>exitingWorker</var> to finish handling any in-progress requests.
-                  </li>
-                  <li><a href="#terminate-service-worker-algorithm">Terminate</a> <var>exitingWorker</var>.</li>
-                  <li>Run the <a href="#update-state-algorithm">Update State</a> algorithm passing <var>exitingWorker</var> and <em>redundant</em> as the arguments.</li>
-                </ol>
-              </li>
-            </ol>
-          </li>
           <li>Run <a href="#activation-algorithm">Activate</a> algorithm, or its <a href="#dfn-processing-equivalence">equivalent</a>, passing <var>registration</var> as the argument.</li>
           <li>Invoke <a href="#finish-job-algorithm">Finish Job</a> with <var>job</var> and abort these steps.</li>
         </ol>