remove the YOLO-World open-vocabulary engine

Deletes the yoloworld_onnx engine, the CLIP BPE tokenizer, the standalone
test binary and both export scripts. Drops the update_vocabulary input and
the yoloworld_onnx/open_vocab dispatch from main.cc, along with the now
unused Engine::set_labels. Documentation follows.

CMakeLists.txt

@@ -25,7 +25,6 @@ add_executable(dora_zed
     src/zed/camera.cc
     src/engines/zed_native.cc
     src/engines/yolo_onnx.cc
-    src/engines/yoloworld_onnx.cc
     ${node_bridge}
 )
 add_dependencies(dora_zed Dora_cxx)
@@ -65,21 +64,3 @@ target_link_libraries(test_yolo_onnx PRIVATE
     ${ONNXRUNTIME_LIBRARIES}
 )
 install(TARGETS test_yolo_onnx DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/bin)
-
-add_executable(test_yoloworld_onnx
-    src/test_yoloworld_onnx.cc
-    src/engines/yoloworld_onnx.cc
-)
-target_include_directories(test_yoloworld_onnx PRIVATE
-    ${CMAKE_CURRENT_SOURCE_DIR}/src
-    ${ZED_INCLUDE_DIRS}
-    ${OpenCV_INCLUDE_DIRS}
-    ${CUDAToolkit_INCLUDE_DIRS}
-    ${ONNXRUNTIME_INCLUDE_DIRS}
-)
-target_link_libraries(test_yoloworld_onnx PRIVATE
-    ${ZED_LIBRARIES}
-    ${OpenCV_LIBS}
-    ${ONNXRUNTIME_LIBRARIES}
-)
-install(TARGETS test_yoloworld_onnx DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/bin)