Revert "Add external_sonnet library"

This reverts commit 81705fb.

external/CMakeLists.txt

@@ -59,9 +59,6 @@ add_checked_subdirectory(qr_code_generator)
 add_checked_subdirectory(ranges)
 add_checked_subdirectory(rlottie)
 add_checked_subdirectory(rnnoise)
-if (add_sonnet_library)
-    add_checked_subdirectory(sonnet)
-endif()
 add_checked_subdirectory(ton)
 add_checked_subdirectory(variant)
 add_checked_subdirectory(vpx)

variables.cmake

@@ -31,22 +31,10 @@ option(DESKTOP_APP_DISABLE_CRASH_REPORTS "Disable crash report generation." ${no
 option(DESKTOP_APP_DISABLE_AUTOUPDATE "Disable autoupdate." ${disable_autoupdate})
 option(DESKTOP_APP_USE_HUNSPELL_ONLY "Disable system spellchecker and use bundled Hunspell only. (For debugging purposes)" OFF)
 cmake_dependent_option(DESKTOP_APP_USE_ENCHANT "Use Enchant instead of bundled Hunspell." OFF LINUX OFF)
+cmake_dependent_option(DESKTOP_APP_USE_CLD3 "Disable system text language recognition and use bundled cld3 only." OFF APPLE ON)
 cmake_dependent_option(DESKTOP_APP_NO_PDB "Disable PDB file generation." OFF WIN32 OFF)
 cmake_dependent_option(DESKTOP_APP_DISABLE_JEMALLOC "Disable jemalloc, use system malloc." OFF LINUX OFF)
 
-if (APPLE)
-    set(language_recognition_default SYSTEM)
-elseif (WIN32)
-    set(language_recognition_default CLD3)
-else()
-    set(language_recognition_default SONNET)
-endif()
-set(DESKTOP_APP_LANGUAGE_RECOGNITION_BACKEND "${language_recognition_default}" CACHE STRING "Text language recognition backend.")
-set_property(CACHE DESKTOP_APP_LANGUAGE_RECOGNITION_BACKEND PROPERTY STRINGS SYSTEM CLD3 SONNET)
-if (LINUX AND DESKTOP_APP_LANGUAGE_RECOGNITION_BACKEND STREQUAL SYSTEM)
-    set(DESKTOP_APP_LANGUAGE_RECOGNITION_BACKEND "${language_recognition_default}")
-endif()
-
 if (APPLE AND NOT DEFINED DESKTOP_APP_MAC_ARCH)
     if (DEFINED CMAKE_OSX_ARCHITECTURES)
         set(DESKTOP_APP_MAC_ARCH "${CMAKE_OSX_ARCHITECTURES}" CACHE STRING "Target macOS arch.")
@@ -64,16 +52,10 @@ if ((WIN32
 endif()
 
 set(add_cld3_library 0)
-if (DESKTOP_APP_LANGUAGE_RECOGNITION_BACKEND STREQUAL CLD3)
+if (LINUX OR DESKTOP_APP_USE_CLD3)
     set(add_cld3_library 1)
 endif()
 
-set(add_sonnet_library 0)
-if (DESKTOP_APP_LANGUAGE_RECOGNITION_BACKEND STREQUAL SONNET)
-    set(add_sonnet_library 1)
-    set(add_hunspell_library 1)
-endif()
-
 set(build_macstore 0)
 set(build_winstore 0) # 32 or 64 bit
 set(build_win64 0) # normal or uwp