docs(event-handler): remove Amplify transformers section (#6937)

* docs(event-handler): remove Amplify transformers section

* Update appsync.md

Co-authored-by: Leandro Damascena <lcdama@amazon.pt>
Signed-off-by: Andrea Amorosi <dreamorosi@gmail.com>

---------

Signed-off-by: Andrea Amorosi <dreamorosi@gmail.com>
Co-authored-by: Andrea Amorosi <aamorosi@amazon.es>
Co-authored-by: Leandro Damascena <lcdama@amazon.pt>

Author: 3 people

docs/core/event_handler/appsync.md

@@ -3,7 +3,7 @@ title: GraphQL API
 description: Core utility
 ---
 
-Event Handler for AWS AppSync and Amplify GraphQL Transformer.
+Event Handler for AWS AppSync GraphQL APIs simplifies routing and processing of events in AWS Lambda functions by allowing you to define resolvers for specific GraphQL types and fields.
 
 ```mermaid
 stateDiagram-v2
@@ -46,7 +46,7 @@ stateDiagram-v2
 
 **[Direct Lambda Resolver](https://docs.aws.amazon.com/appsync/latest/devguide/direct-lambda-reference.html){target="_blank"}**. A custom AppSync Resolver to bypass the use of Apache Velocity Template (VTL) and automatically map your function's response to a GraphQL field.
 
-**[Amplify GraphQL Transformer](https://docs.amplify.aws/cli/graphql-transformer/function){target="_blank"}**. Custom GraphQL directives to define your application's data model using Schema Definition Language _(SDL)_, _e.g., `@function`_. Amplify CLI uses these directives to convert GraphQL SDL into full descriptive AWS CloudFormation templates.
+**[Batching resolvers](https://docs.aws.amazon.com/appsync/latest/devguide/tutorial-lambda-resolvers.html#advanced-use-case-batching){target="_blank"}**. A technique that allows you to batch multiple GraphQL requests into a single Lambda function invocation, reducing the number of calls and improving performance.
 
 ## Getting started
 
@@ -170,55 +170,6 @@ For Lambda Python3.8+ runtime, this utility supports async functions when you us
 --8<-- "examples/event_handler_graphql/src/async_resolvers.py"
 ```
 
-### Amplify GraphQL Transformer
-
-Assuming you have [Amplify CLI installed](https://docs.amplify.aws/cli/start/install){target="_blank"}, create a new API using `amplify add api` and use the following GraphQL Schema.
-
-<!-- AppSync resolver decorator is a concise way to create lambda functions to handle AppSync resolvers for multiple `typeName` and `fieldName` declarations. -->
-
-```typescript hl_lines="7 15 20 22" title="Example GraphQL Schema"
---8<-- "examples/event_handler_graphql/src/amplify_graphql_transformer_schema.graphql"
-```
-
-[Create two new basic Python functions](https://docs.amplify.aws/cli/function#set-up-a-function){target="_blank"} via `amplify add function`.
-
-???+ note
-    Amplify CLI generated functions use `Pipenv` as a dependency manager. Your function source code is located at **`amplify/backend/function/your-function-name`**.
-
-Within your function's folder, add Powertools for AWS Lambda (Python) as a dependency with `pipenv install aws-lambda-powertools`.
-
-Use the following code for `merchantInfo` and `searchMerchant` functions respectively.
-
-=== "graphql_transformer_merchant_info.py"
-
-    ```python hl_lines="4 6 23 24 29 30 36"
-    --8<-- "examples/event_handler_graphql/src/graphql_transformer_merchant_info.py"
-    ```
-
-=== "graphql_transformer_search_merchant.py"
-
-    ```python hl_lines="4 6 21 22 36 42"
-    --8<-- "examples/event_handler_graphql/src/graphql_transformer_search_merchant.py"
-    ```
-
-=== "graphql_transformer_list_locations.json"
-
-    ```json hl_lines="2-7"
-    --8<-- "examples/event_handler_graphql/src/graphql_transformer_list_locations.json"
-    ```
-
-=== "graphql_transformer_common_field.json"
-
-    ```json hl_lines="2 3"
-    --8<-- "examples/event_handler_graphql/src/graphql_transformer_common_field.json"
-    ```
-
-=== "graphql_transformer_find_merchant.json"
-
-    ```json hl_lines="2-6"
-    --8<-- "examples/event_handler_graphql/src/graphql_transformer_find_merchant.json"
-    ```
-
 ### Custom data models
 
 You can subclass [AppSyncResolverEvent](../../utilities/data_classes.md#appsync-resolver){target="_blank"} to bring your own set of methods to handle incoming events, by using `data_model` param in the `resolve` method.