[#noissue] Cleanup unused code

Author: binDongKim

web/src/main/angular/src/app/core/components/main-contents/main-contents-container.component.html

@@ -1,5 +1,5 @@
 <section>
-    <div class="l-main-contents-top font-opensans" [class.sideNavigationUI]="sideNavigationUI">
+    <div class="l-main-contents-top font-opensans">
         <ng-container *ngIf="showElements$ | async">
             <div class="l-fixed-period-mover-wrapper">
                 <pp-fixed-period-mover-container></pp-fixed-period-mover-container>

web/src/main/angular/src/app/core/components/main-contents/main-contents-container.component.ts

@@ -13,8 +13,6 @@ import { UrlPathId } from 'app/shared/models';
     changeDetection: ChangeDetectionStrategy.OnPush
 })
 export class MainContentsContainerComponent implements OnInit {
-    sideNavigationUI: boolean;
-    
     showElements$: Observable<boolean>;
     enableRealTime$: Observable<boolean>;
 
@@ -29,8 +27,6 @@ export class MainContentsContainerComponent implements OnInit {
     ) {}
 
     ngOnInit() {
-        this.sideNavigationUI = this.webAppSettingDataService.getExperimentalOption('sideNavigationUI');
-        
         this.showElements$ = this.newUrlStateNotificationService.onUrlStateChange$.pipe(
             map((urlService: NewUrlStateNotificationService) => urlService.hasValue(UrlPathId.PERIOD, UrlPathId.END_TIME))
         );

web/src/main/angular/src/app/core/components/server-status/server-status-container.component.html

@@ -1,6 +1,5 @@
 <div class="l-status" *ngIf="hasServerList">
     <button class="pinpoint-btn" [disabled]="enableRealTime" (click)="onClickViewServer()"><span><i class="fas fa-angle-{{spreadAngleIndicator}}" [hidden]="isLoading"></i><i class="fas fa-spinner fa-spin fa-fw" style="top:0px;left:-10px;" [hidden]="!isLoading"></i>VIEW SERVERS</span></button>
-    <button class="pinpoint-btn" (click)="onClickOpenInspector()" *ngIf="isWAS && !sideNavigationUI"><span><i class="fas fa-chart-line"></i><span>Inspector</span></span></button>
     <ul class="l-status-count">
         <li>Total <span class="l-total">{{node.instanceCount}}</span></li>
         <li>Error <span class="l-error">{{node.instanceErrorCount || 0}}</span></li>

web/src/main/angular/src/app/core/components/server-status/server-status-container.component.ts

@@ -17,8 +17,6 @@ export class ServerStatusContainerComponent implements OnInit, OnDestroy {
     private _isInfoPerServerShow: boolean;
     private selectedAgent = '';
 
-    sideNavigationUI: boolean;
-
     enableRealTime: boolean;
     node: INodeInfo;
     isLoading = false;
@@ -35,12 +33,9 @@ export class ServerStatusContainerComponent implements OnInit, OnDestroy {
         private analyticsService: AnalyticsService,
         private cd: ChangeDetectorRef,
         private messageQueueService: MessageQueueService,
-        private webAppSettingDataService: WebAppSettingDataService,
     ) {}
 
     ngOnInit() {
-        this.sideNavigationUI = this.webAppSettingDataService.getExperimentalOption('sideNavigationUI');
-        
         this.newUrlStateNotificationService.onUrlStateChange$.pipe(
             takeUntil(this.unsubscribe)
         ).subscribe((urlService: NewUrlStateNotificationService) => {