Remove '.js' from imports in typescript files

Change-Id: I94a0b5a4ff81a25047cf92bbd48221715fb00c89
diff --git a/polygerrit-ui/app/elements/change-list/gr-create-commands-dialog/gr-create-commands-dialog_test.ts b/polygerrit-ui/app/elements/change-list/gr-create-commands-dialog/gr-create-commands-dialog_test.ts
index 42aed07..195ccb7 100644
--- a/polygerrit-ui/app/elements/change-list/gr-create-commands-dialog/gr-create-commands-dialog_test.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-create-commands-dialog/gr-create-commands-dialog_test.ts
@@ -15,9 +15,9 @@
  * limitations under the License.
  */
 
-import '../../../test/common-test-setup-karma.js';
-import './gr-create-commands-dialog.js';
-import {GrCreateCommandsDialog} from './gr-create-commands-dialog.js';
+import '../../../test/common-test-setup-karma';
+import './gr-create-commands-dialog';
+import {GrCreateCommandsDialog} from './gr-create-commands-dialog';
 
 const basicFixture = fixtureFromElement('gr-create-commands-dialog');
 
diff --git a/polygerrit-ui/app/elements/checks/gr-hovercard-run_test.ts b/polygerrit-ui/app/elements/checks/gr-hovercard-run_test.ts
index 80d8e5e..67781f5 100644
--- a/polygerrit-ui/app/elements/checks/gr-hovercard-run_test.ts
+++ b/polygerrit-ui/app/elements/checks/gr-hovercard-run_test.ts
@@ -15,10 +15,10 @@
  * limitations under the License.
  */
 
-import '../../test/common-test-setup-karma.js';
-import './gr-hovercard-run.js';
-import {html} from '@polymer/polymer/lib/utils/html-tag.js';
-import {GrHovercardRun} from './gr-hovercard-run.js';
+import '../../test/common-test-setup-karma';
+import './gr-hovercard-run';
+import {html} from '@polymer/polymer/lib/utils/html-tag';
+import {GrHovercardRun} from './gr-hovercard-run';
 
 const basicFixture = fixtureFromTemplate(html`
   <gr-hovercard-run class="hovered"></gr-hovercard-run>
diff --git a/polygerrit-ui/app/elements/diff/gr-context-controls/gr-context-controls.ts b/polygerrit-ui/app/elements/diff/gr-context-controls/gr-context-controls.ts
index c502346..86a60ce 100644
--- a/polygerrit-ui/app/elements/diff/gr-context-controls/gr-context-controls.ts
+++ b/polygerrit-ui/app/elements/diff/gr-context-controls/gr-context-controls.ts
@@ -22,7 +22,7 @@
 import '@polymer/paper-icon-button/paper-icon-button';
 import '@polymer/paper-item/paper-item';
 import '@polymer/paper-listbox/paper-listbox';
-import '@polymer/paper-tooltip/paper-tooltip.js';
+import '@polymer/paper-tooltip/paper-tooltip';
 import {of, EMPTY, Subject} from 'rxjs';
 import {switchMap, delay, takeUntil} from 'rxjs/operators';
 
diff --git a/polygerrit-ui/app/elements/shared/gr-alert/gr-alert_test.ts b/polygerrit-ui/app/elements/shared/gr-alert/gr-alert_test.ts
index cf0c34a..3478a9a 100644
--- a/polygerrit-ui/app/elements/shared/gr-alert/gr-alert_test.ts
+++ b/polygerrit-ui/app/elements/shared/gr-alert/gr-alert_test.ts
@@ -15,9 +15,9 @@
  * limitations under the License.
  */
 
-import '../../../test/common-test-setup-karma.js';
-import './gr-alert.js';
-import {GrAlert} from './gr-alert.js';
+import '../../../test/common-test-setup-karma';
+import './gr-alert';
+import {GrAlert} from './gr-alert';
 import * as MockInteractions from '@polymer/iron-test-helpers/mock-interactions';
 
 suite('gr-alert tests', () => {
diff --git a/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread_test.ts b/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread_test.ts
index 2eeb12d..d068cea 100644
--- a/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread_test.ts
+++ b/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread_test.ts
@@ -44,7 +44,7 @@
   tap,
   pressAndReleaseKeyOn,
 } from '@polymer/iron-test-helpers/mock-interactions';
-import {html} from '@polymer/polymer/lib/utils/html-tag.js';
+import {html} from '@polymer/polymer/lib/utils/html-tag';
 import {stubRestApi, stubStorage} from '../../../test/test-utils';
 
 const basicFixture = fixtureFromElement('gr-comment-thread');
diff --git a/polygerrit-ui/app/elements/shared/gr-shell-command/gr-shell-command_test.ts b/polygerrit-ui/app/elements/shared/gr-shell-command/gr-shell-command_test.ts
index 1a7d2cd..a17b171 100644
--- a/polygerrit-ui/app/elements/shared/gr-shell-command/gr-shell-command_test.ts
+++ b/polygerrit-ui/app/elements/shared/gr-shell-command/gr-shell-command_test.ts
@@ -15,9 +15,9 @@
  * limitations under the License.
  */
 
-import '../../../test/common-test-setup-karma.js';
-import './gr-shell-command.js';
-import {GrShellCommand} from './gr-shell-command.js';
+import '../../../test/common-test-setup-karma';
+import './gr-shell-command';
+import {GrShellCommand} from './gr-shell-command';
 
 const basicFixture = fixtureFromElement('gr-shell-command');