Revert "[feature](lance) Add Rust-based Lance format reader for AI-native data (#62182)

be/CMakeLists.txt

@@ -181,27 +181,6 @@ if (DEFINED ENV{PAIMON_HOME} AND NOT PAIMON_HOME)
     set(PAIMON_HOME "$ENV{PAIMON_HOME}" CACHE PATH "" FORCE)
 endif()
 
-option(BUILD_RUST_READERS "Build Rust-based format readers (Lance, etc.)" OFF)
-if (DEFINED ENV{BUILD_RUST_READERS})
-    set(BUILD_RUST_READERS "$ENV{BUILD_RUST_READERS}" CACHE BOOL "" FORCE)
-endif()
-# Auto-enable if pre-built Rust library exists (from zigbuild or manylinux2014)
-if (NOT BUILD_RUST_READERS)
-    if (EXISTS "${SRC_DIR}/rust/doris-native/target/x86_64-unknown-linux-gnu/release/libdoris_ffi.a"
-        OR EXISTS "${SRC_DIR}/rust/doris-native/target/release/libdoris_ffi.a")
-        set(BUILD_RUST_READERS ON)
-        message(STATUS "Auto-enabling BUILD_RUST_READERS: pre-built library found")
-    endif()
-endif()
-if (BUILD_RUST_READERS)
-    # rust.cmake detects pre-built .a or builds via Corrosion.
-    # If neither exists, it sets BUILD_RUST_READERS=OFF and returns.
-    include(cmake/rust.cmake)
-endif()
-if (BUILD_RUST_READERS)
-    add_definitions(-DBUILD_RUST_READERS)
-endif()
-
 set(CMAKE_SKIP_RPATH TRUE)
 set(Boost_USE_STATIC_LIBS ON)
 set(Boost_USE_STATIC_RUNTIME ON)
@@ -736,10 +715,6 @@ if (ENABLE_PAIMON_CPP)
     set(DORIS_DEPENDENCIES ${DORIS_DEPENDENCIES} tbb_paimon)
 endif()
 
-if (BUILD_RUST_READERS)
-    set(DORIS_DEPENDENCIES ${DORIS_DEPENDENCIES} doris_ffi_lib)
-endif()
-
 set(DORIS_DEPENDENCIES ${DORIS_DEPENDENCIES} ${WL_END_GROUP})
 
 # Add all external dependencies. They should come after the palo libs.

be/src/exec/scan/file_scanner.cpp

@@ -82,9 +82,6 @@
 #include "format/table/transactional_hive_reader.h"
 #include "format/table/trino_connector_jni_reader.h"
 #include "format/text/text_reader.h"
-#ifdef BUILD_RUST_READERS
-#include "format/lance/lance_rust_reader.h"
-#endif
 #include "io/cache/block_file_cache_profile.h"
 #include "load/group_commit/wal/wal_reader.h"
 #include "runtime/descriptors.h"
@@ -1269,16 +1266,6 @@ Status FileScanner::_get_next_reader() {
             }
             break;
         }
-#ifdef BUILD_RUST_READERS
-        case TFileFormatType::FORMAT_LANCE: {
-            auto lance_reader = LanceRustReader::create_unique(_file_slot_descs, _state, _profile,
-                                                               range, _params);
-            init_status = lance_reader->init_reader();
-            _cur_reader = std::move(lance_reader);
-            need_to_get_parsed_schema = true;
-            break;
-        }
-#endif
         case TFileFormatType::FORMAT_ES_HTTP: {
             _cur_reader = EsHttpReader::create_unique(_file_slot_descs, _state, _profile, range,
                                                       *_params, _real_tuple_desc);

be/src/format/CMakeLists.txt

@@ -26,12 +26,6 @@ file(GLOB_RECURSE FORMAT_V2_SRC_FILES CONFIGURE_DEPENDS
     ${CMAKE_CURRENT_SOURCE_DIR}/../format_v2/*.cpp)
 list(APPEND SRC_FILES ${FORMAT_V2_SRC_FILES})
 
-# Lance reader requires Rust static library (BUILD_RUST_READERS=ON)
-if (NOT BUILD_RUST_READERS)
-    file(GLOB_RECURSE LANCE_FILES CONFIGURE_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/lance/*.cpp)
-    list(REMOVE_ITEM SRC_FILES ${LANCE_FILES})
-endif()
-
 add_library(Format STATIC ${SRC_FILES})
 
 pch_reuse(Format)