Remove deprecated property alert from combobox

Refs: #7015

packages/components/src/components/combobox/shadow.tsx

@@ -376,12 +376,6 @@ export class KolCombobox implements ComboboxAPI {
 	 */
 	@Prop() public _placeholder?: string;
 
-	/**
-	 * Defines whether the screen-readers should read out the notification.
-	 * @deprecated Will be removed in v3. Use automatic behaviour instead.
-	 */
-	@Prop({ mutable: true, reflect: true }) public _alert?: boolean;
-
 	/**
 	 * Makes the element not focusable and ignore all events.
 	 */
@@ -495,10 +489,7 @@ export class KolCombobox implements ComboboxAPI {
 	}
 
 	private showAsAlert(): boolean {
-		if (this.state._alert === undefined) {
-			return Boolean(this.state._touched) && !this.inputHasFocus;
-		}
-		return this.state._alert;
+		return Boolean(this.state._touched) && !this.inputHasFocus;
 	}
 
 	@Watch('_placeholder')
@@ -511,11 +502,6 @@ export class KolCombobox implements ComboboxAPI {
 		this.controller.validateAccessKey(value);
 	}
 
-	@Watch('_alert')
-	public validateAlert(value?: boolean): void {
-		this.controller.validateAlert(value);
-	}
-
 	@Watch('_disabled')
 	public validateDisabled(value?: boolean): void {
 		this.controller.validateDisabled(value);

packages/components/src/schema/components/combobox.ts

@@ -45,7 +45,6 @@ type RequiredStates = {
 	PropHideError &
 	PropLabelWithExpertSlot;
 type OptionalStates = {
-	alert: boolean;
 	hint: string;
 	icons: KoliBriHorizontalIcons;
 	on: InputTypeOnDefault;