Retire GET /v2/bot/message/delivery/ad_phone (#1535)

line/line-openapi#82

`GET /v2/bot/message/delivery/ad_phone` was sunset.
This change removes it as it's no longer necessary to include it in
line-openapi.

Co-authored-by: github-actions <[email protected]>

Author: github-actions[bot]

Diff for: clients/line-bot-messaging-api-client/src/main/java/com/linecorp/bot/messaging/client/MessagingApiClient.java

@@ -143,18 +143,6 @@ CompletableFuture<Result<Void>> createRichMenuAlias(
   CompletableFuture<Result<Void>> deleteRichMenuAlias(
       @Path("richMenuAliasId") String richMenuAliasId);
 
-  /**
-   * Get result of message delivery using phone number
-   *
-   * @param date Date the message was sent Format: &#x60;yyyyMMdd&#x60; (e.g. &#x60;20190831&#x60;)
-   *     Time Zone: UTC+9 (required)
-   * @see <a href="https://developers.line.biz/en/reference/partner-docs/#get-phone-audience-match">
-   *     Documentation</a>
-   */
-  @GET("/v2/bot/message/delivery/ad_phone")
-  CompletableFuture<Result<NumberOfMessagesResponse>> getAdPhoneMessageStatistics(
-      @Query("date") String date);
-
   /**
    * Get name list of units used this month
    *

Diff for: clients/line-bot-messaging-api-client/src/test/java/com/linecorp/bot/messaging/client/MessagingApiClientTest.java

@@ -276,34 +276,6 @@ public void deleteRichMenuAliasTest() {
     // TODO: test validations
   }
 
-  @Test
-  public void getAdPhoneMessageStatisticsTest() {
-    stubFor(
-        get(urlPathTemplate("/v2/bot/message/delivery/ad_phone"))
-            .willReturn(
-                aResponse()
-                    .withStatus(200)
-                    .withHeader("content-type", "application/json")
-                    .withBody("{}")));
-
-    String date =
-        Arranger.some(
-            String.class,
-            Map.of(
-                "message",
-                () -> new TextMessage("hello"),
-                "recipient",
-                () -> null,
-                "filter",
-                () -> null));
-
-    NumberOfMessagesResponse response = api.getAdPhoneMessageStatistics(date).join().body();
-
-    assertThat(response).isNotNull();
-
-    // TODO: test validations
-  }
-
   @Test
   public void getAggregationUnitNameListTest() {
     stubFor(