refactor: remove unused arrow_c_data_internal files

- Delete unused nanoarrow example code and test files
- Clean up dependencies and remove obsolete test cases

Author: nullccxsy

src/iceberg/CMakeLists.txt

@@ -18,7 +18,6 @@
 set(ICEBERG_INCLUDES "$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/src>"
                      "$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/src>")
 set(ICEBERG_SOURCES
-    arrow_c_data_internal.cc
     catalog/in_memory_catalog.cc
     expression/expression.cc
     expression/literal.cc

src/iceberg/arrow_c_data_internal.cc

@@ -28,46 +28,12 @@
 #include <arrow/util/key_value_metadata.h>
 #include <gtest/gtest.h>
 
-#include "iceberg/arrow_c_data_internal.h"
 #include "iceberg/schema.h"
 #include "iceberg/schema_internal.h"
 #include "matchers.h"
 
 namespace iceberg {
 
-TEST(ArrowCDataTest, CheckArrowSchemaAndArrayByNanoarrow) {
-  auto [schema, array] = internal::CreateExampleArrowSchemaAndArrayByNanoarrow();
-
-  auto arrow_schema = ::arrow::ImportSchema(&schema).ValueOrDie();
-  EXPECT_EQ(arrow_schema->num_fields(), 2);
-
-  auto id_field = arrow_schema->field(0);
-  EXPECT_EQ(id_field->name(), "id");
-  EXPECT_EQ(id_field->type()->id(), ::arrow::Type::INT64);
-  EXPECT_FALSE(id_field->nullable());
-
-  auto name_field = arrow_schema->field(1);
-  EXPECT_EQ(name_field->name(), "name");
-  EXPECT_EQ(name_field->type()->id(), ::arrow::Type::STRING);
-  EXPECT_TRUE(name_field->nullable());
-
-  auto arrow_record_batch = ::arrow::ImportRecordBatch(&array, arrow_schema).ValueOrDie();
-  EXPECT_EQ(arrow_record_batch->num_rows(), 3);
-  EXPECT_EQ(arrow_record_batch->num_columns(), 2);
-
-  auto id_column = arrow_record_batch->column(0);
-  EXPECT_EQ(id_column->type()->id(), ::arrow::Type::INT64);
-  EXPECT_EQ(id_column->GetScalar(0).ValueOrDie()->ToString(), "1");
-  EXPECT_EQ(id_column->GetScalar(1).ValueOrDie()->ToString(), "2");
-  EXPECT_EQ(id_column->GetScalar(2).ValueOrDie()->ToString(), "3");
-
-  auto name_column = arrow_record_batch->column(1);
-  EXPECT_EQ(name_column->type()->id(), ::arrow::Type::STRING);
-  EXPECT_EQ(name_column->GetScalar(0).ValueOrDie()->ToString(), "a");
-  EXPECT_EQ(name_column->GetScalar(1).ValueOrDie()->ToString(), "b");
-  EXPECT_EQ(name_column->GetScalar(2).ValueOrDie()->ToString(), "c");
-}
-
 struct ToArrowSchemaParam {
   std::shared_ptr<Type> iceberg_type;
   bool optional = true;