Remove one broken and one useless example

Author: Algunenano

src/Common/examples/CMakeLists.txt

@@ -25,17 +25,11 @@ target_link_libraries (compact_array PRIVATE clickhouse_common_io clickhouse_com
 clickhouse_add_executable (radix_sort radix_sort.cpp)
 target_link_libraries (radix_sort PRIVATE clickhouse_common_io clickhouse_common_config ch_contrib::pdqsort)
 
-clickhouse_add_executable (arena_with_free_lists arena_with_free_lists.cpp)
-target_link_libraries (arena_with_free_lists PRIVATE dbms)
-
 if (OS_LINUX)
     clickhouse_add_executable (thread_creation_latency thread_creation_latency.cpp)
     target_link_libraries (thread_creation_latency PRIVATE dbms clickhouse_common_io clickhouse_common_config)
 endif()
 
-clickhouse_add_executable (space_saving space_saving.cpp)
-target_link_libraries (space_saving PRIVATE dbms clickhouse_common_io clickhouse_common_config)
-
 clickhouse_add_executable (integer_hash_tables_benchmark integer_hash_tables_benchmark.cpp)
 target_link_libraries (integer_hash_tables_benchmark PRIVATE dbms ch_contrib::abseil_swiss_tables ch_contrib::sparsehash)