fix: remove unrelated change

Author: diegomarquezp

sdk-platform-java/gax-java/gax/src/main/java/com/google/api/gax/tracing/ApiTracer.java

@@ -183,16 +183,6 @@ default void responseReceived() {}
   default void requestSent() {}
   ;
 
-  /**
-   * Adds an annotation that a streaming request has been sent.
-   *
-   * @param requestSize the size of the request in bytes.
-   */
-  default void requestSent(long requestSize) {
-    requestSent();
-  }
-  ;
-
   /**
    * Adds an annotation that a batch of writes has been flushed.
    *