feat(poll): add delete poll option endpoint

- Add DeletePollOptionRequest class with userId support
- Add deleteOption() static factory method
- Add DELETE /polls/{poll_id}/options/{option_id} service method
- Add unit test for poll option deletion

Author: GwFreak01

src/main/java/io/getstream/chat/java/models/Poll.java

@@ -531,6 +531,31 @@ protected Call<UpdatePollOptionResponse> generateCall(Client client) throws Stre
     }
   }
 
+  /** Request for deleting a poll option. */
+  @Getter
+  @EqualsAndHashCode
+  public static class DeletePollOptionRequest extends StreamRequest<StreamResponseObject> {
+    @NotNull private final String pollId;
+    @NotNull private final String optionId;
+    @Nullable private String userId;
+
+    public DeletePollOptionRequest(@NotNull String pollId, @NotNull String optionId) {
+      this.pollId = pollId;
+      this.optionId = optionId;
+    }
+
+    @NotNull
+    public DeletePollOptionRequest userId(@NotNull String userId) {
+      this.userId = userId;
+      return this;
+    }
+
+    @Override
+    protected Call<StreamResponseObject> generateCall(Client client) throws StreamException {
+      return client.create(PollService.class).deleteOption(this.pollId, this.optionId, this.userId);
+    }
+  }
+
   /** Request data for creating a poll. */
   @Builder(
       builderClassName = "CreatePollRequest",
@@ -671,4 +696,17 @@ public static UpdatePollOptionRequestData.UpdatePollOptionRequest updateOption(
       @NotNull String pollId) {
     return new UpdatePollOptionRequestData.UpdatePollOptionRequest(pollId);
   }
+
+  /**
+   * Deletes a poll option.
+   *
+   * @param pollId the poll ID
+   * @param optionId the option ID
+   * @return the created request
+   */
+  @NotNull
+  public static DeletePollOptionRequest deleteOption(
+      @NotNull String pollId, @NotNull String optionId) {
+    return new DeletePollOptionRequest(pollId, optionId);
+  }
 }

src/main/java/io/getstream/chat/java/services/PollService.java

@@ -98,4 +98,18 @@ Call<CreatePollOptionResponse> createOption(
   @PUT("polls/{poll_id}/options")
   Call<UpdatePollOptionResponse> updateOption(
       @NotNull @Path("poll_id") String pollId, @NotNull @Body UpdatePollOptionRequestData request);
+
+  /**
+   * Deletes a poll option.
+   *
+   * @param pollId The poll ID
+   * @param optionId The option ID
+   * @param userId Optional user ID
+   * @return A response indicating success
+   */
+  @DELETE("polls/{poll_id}/options/{option_id}")
+  Call<StreamResponseObject> deleteOption(
+      @NotNull @Path("poll_id") String pollId,
+      @NotNull @Path("option_id") String optionId,
+      @Nullable @Query("user_id") String userId);
 }

src/test/java/io/getstream/chat/java/PollTest.java

@@ -350,4 +350,32 @@ void whenUpdatingPollOption_thenNoException() {
     Assertions.assertNotNull(updateResponse.getPollOption());
     Assertions.assertEquals(newText, updateResponse.getPollOption().getText());
   }
+
+  @DisplayName("Can delete a poll option")
+  @Test
+  void whenDeletingPollOption_thenNoException() {
+    // Create a poll with multiple options
+    CreatePollResponse createResponse =
+        Assertions.assertDoesNotThrow(
+            () ->
+                Poll.create()
+                    .name("Poll for option delete " + UUID.randomUUID())
+                    .userId(testUserRequestObject.getId())
+                    .option(PollOptionRequestObject.builder().text("Option 1").build())
+                    .option(PollOptionRequestObject.builder().text("Option 2").build())
+                    .request());
+
+    String pollId = createResponse.getPoll().getId();
+    String optionId = createResponse.getPoll().getOptions().get(0).getId();
+
+    // Delete the option
+    StreamResponseObject deleteResponse =
+        Assertions.assertDoesNotThrow(
+            () ->
+                Poll.deleteOption(pollId, optionId)
+                    .userId(testUserRequestObject.getId())
+                    .request());
+
+    Assertions.assertNotNull(deleteResponse);
+  }
 }