remove preferencechange listener

Signed-off-by: Uni Sayo <[email protected]>

packages/terminal/src/browser/terminal-widget-impl.ts

@@ -18,7 +18,7 @@ import * as Xterm from 'xterm';
 import { proposeGeometry } from 'xterm/lib/addons/fit/fit';
 import { inject, injectable, named, postConstruct } from 'inversify';
 import { Disposable, Event, Emitter, ILogger, DisposableCollection } from '@theia/core';
-import { Widget, Message, WebSocketConnectionProvider, StatefulWidget, isFirefox, MessageLoop, PreferenceChangeEvent, KeyCode } from '@theia/core/lib/browser';
+import { Widget, Message, WebSocketConnectionProvider, StatefulWidget, isFirefox, MessageLoop, KeyCode } from '@theia/core/lib/browser';
 import { isOSX } from '@theia/core/lib/common';
 import { WorkspaceService } from '@theia/workspace/lib/browser';
 import { ShellTerminalServerProxy } from '../common/shell-terminal-protocol';
@@ -29,7 +29,7 @@ import { ThemeService } from '@theia/core/lib/browser/theming';
 import { TerminalWidgetOptions, TerminalWidget } from './base/terminal-widget';
 import { MessageConnection } from 'vscode-jsonrpc';
 import { Deferred } from '@theia/core/lib/common/promise-util';
-import { TerminalPreferences, TerminalConfiguration } from './terminal-preferences';
+import { TerminalPreferences } from './terminal-preferences';
 
 export const TERMINAL_WIDGET_FACTORY_ID = 'terminal';
 
@@ -84,9 +84,6 @@ export class TerminalWidgetImpl extends TerminalWidget implements StatefulWidget
         this.title.label = this.options.title || this.TERMINAL;
         this.title.iconClass = 'fa fa-terminal';
 
-        this.preferences.onPreferenceChanged(e => {
-            this.onPreferenceChanged(e);
-        });
         if (this.options.destroyTermOnClose === true) {
             this.toDispose.push(Disposable.create(() =>
                 this.term.destroy()
@@ -435,10 +432,5 @@ export class TerminalWidgetImpl extends TerminalWidget implements StatefulWidget
     protected attachCustomKeyEventHandler(): void {
         this.term.attachCustomKeyEventHandler(e => this.customKeyHandler(e));
     }
-    protected async onPreferenceChanged(event: PreferenceChangeEvent<TerminalConfiguration>): Promise<void> {
-        const { preferenceName } = event;
-        if (preferenceName === 'terminal.enableCopy' || preferenceName === 'terminal.enablePaste') {
-            this.attachCustomKeyEventHandler();
-        }
-    }
+
 }