chore: remove pending_update_test (#379)

Closes #378

Author: WZhuo

src/iceberg/test/CMakeLists.txt

@@ -81,7 +81,6 @@ add_iceberg_test(schema_test
 add_iceberg_test(table_test
                  SOURCES
                  json_internal_test.cc
-                 pending_update_test.cc
                  schema_json_test.cc
                  table_test.cc
                  table_metadata_builder_test.cc