Added Copyrights to app module file

app.module.ts

@@ -1,3 +1,20 @@
+/**
+ * Copyright (c) 2020 Software AG, Darmstadt, Germany and/or its licensors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 import { NgModule } from '@angular/core';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 import { RouterModule as ngRouterModule } from '@angular/router';

widget/gp-device-details-widget-config/gp-device-details-widget-config.component.ts

@@ -16,7 +16,6 @@
 * limitations under the License.
 */
 import { Component, OnInit, Input } from '@angular/core';
-import { Observable } from 'rxjs';
 import { GpDeviceDetailsWidgetService } from '../gp-device-details-widget.service';
 @Component({
  selector: 'lib-gp-device-details-widget-config',