UI: Clear code after upgrade Angular

-/**
- * Copyright © 2016-2021 The Thingsboard Authors
- *
- * 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.
- */
-:host ::ng-deep {
-  textarea.mat-input-element.cdk-textarea-autosize {
-    box-sizing: content-box;
-  }
-}

@@ -41,7 +41,7 @@ import { Subject } from 'rxjs';
 @Component({
   selector: 'tb-security-config-lwm2m-server',
   templateUrl: './security-config-lwm2m-server.component.html',
-  styleUrls: ['./security-config-lwm2m-server.component.scss'],
+  styleUrls: [],
   providers: [
     {
       provide: NG_VALUE_ACCESSOR,

@@ -27,8 +27,4 @@
   .mat-tab-body {
     padding: 16px 0;
   }
-
-  textarea.mat-input-element.cdk-textarea-autosize {
-    box-sizing: content-box;
-  }
 }