remove unused import

Author: sbatten

src/vs/workbench/browser/parts/panel/panelActions.ts

@@ -13,7 +13,7 @@ import { IWorkbenchActionRegistry, Extensions as WorkbenchExtensions, CATEGORIES
 import { IWorkbenchLayoutService, PanelAlignment, Parts, Position, positionToString } from 'vs/workbench/services/layout/browser/layoutService';
 import { ActivityAction, ToggleCompositePinnedAction, ICompositeBar } from 'vs/workbench/browser/parts/compositeBarActions';
 import { IActivity } from 'vs/workbench/common/activity';
-import { ActivePanelContext, PanelAlignmentContext, PanelMaximizedContext, PanelPositionContext, PanelVisibleContext } from 'vs/workbench/common/contextkeys';
+import { PanelAlignmentContext, PanelMaximizedContext, PanelPositionContext, PanelVisibleContext } from 'vs/workbench/common/contextkeys';
 import { ContextKeyExpr, ContextKeyExpression } from 'vs/platform/contextkey/common/contextkey';
 import { Codicon } from 'vs/base/common/codicons';
 import { registerIcon } from 'vs/platform/theme/common/iconRegistry';