OZG-7573 apply code review

ozgcloud-common-lib/src/main/java/de/ozgcloud/common/binaryfile/GrpcFileUploadUtils.java

@@ -152,7 +152,7 @@ public class GrpcFileUploadUtils {
 
 		}
 
-		long sendNextChunk() {
+		void sendNextChunk() {
 			byte[] contentToSend = streamReader.getNextData();
 
 			if (streamReader.getLastReadSize() > 0) {
@@ -160,7 +160,6 @@ public class GrpcFileUploadUtils {
 			} else {
 				endTransfer();
 			}
-			return contentToSend.length;
 		}
 
 		private void endTransfer() {

ozgcloud-common-lib/src/test/java/de/ozgcloud/common/binaryfile/GrpcFileUploadUtilsTest.java

@@ -149,13 +149,6 @@ class GrpcFileUploadUtilsTest {
 				verify(fileSender).sendChunk(chunkCaptor.capture(), eq(content.length));
 				assertThat(chunkCaptor.getValue()).contains(content);
 			}
-
-			@Test
-			void shouldReturnChunkSize() {
-				var cotnentLength = fileSender.sendNextChunk();
-
-				assertThat(cotnentLength).isEqualTo(GrpcFileUploadUtils.CHUNK_SIZE);
-			}
 		}
 
 		@Nested
@@ -175,7 +168,6 @@ class GrpcFileUploadUtilsTest {
 
 				@Test
 				void shouldCallOnCompleted() {
-
 					fileSender.sendNextChunk();
 
 					verify(requestObserver).onCompleted();
@@ -211,7 +203,6 @@ class GrpcFileUploadUtilsTest {
 
 				@Test
 				void shouldNotCallOnCompleted() {
-
 					fileSender.sendNextChunk();
 
 					verify(requestObserver, never()).onCompleted();