diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0b9dd623fe2..325147204b5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -353,12 +353,6 @@ endif()
 
 include (cmake/print_flags.cmake)
 
-# Directory for Yandex specific files
-set (TIFLASH_PRIVATE_DIR ${TiFlash_SOURCE_DIR}/private/)
-if (EXISTS ${TIFLASH_PRIVATE_DIR})
-    add_subdirectory (${TIFLASH_PRIVATE_DIR})
-endif ()
-
 # Enable tests by default when build type is debug
 if (CMAKE_BUILD_TYPE_UC STREQUAL "DEBUG")
     set (ENABLE_TESTS_DEFAULT ON)
diff --git a/dbms/src/Common/StringUtils/CMakeLists.txt b/dbms/src/Common/StringUtils/CMakeLists.txt
index cc69ace2549..8ea4b84533c 100644
--- a/dbms/src/Common/StringUtils/CMakeLists.txt
+++ b/dbms/src/Common/StringUtils/CMakeLists.txt
@@ -1,6 +1,3 @@
-# These files are located in separate library, because they are used by Yandex.Metrika code
-#  in places when no dependency on whole "dbms" library is possible.
-
 include(${TiFlash_SOURCE_DIR}/cmake/dbms_glob_sources.cmake)
 
 add_headers_and_sources(clickhouse_common_stringutils .)