Remove gemma4-31b dflash implementations

Author: cthotti

.gitignore

@@ -89,6 +89,3 @@ extension/pybindings/mlx.metallib
 
 # Scratch/WIP work not ready for review -- never committed
 /wip/
-gemma-4-31B-it-DFlash/
-gemma-4-31B-it-HQQ-INT4/
-gemma4_31b_dflash_exports_mlx/

examples/models/gemma4_31b/CMakeLists.txt

@@ -74,13 +74,6 @@ target_include_directories(
 )
 target_link_libraries(gemma4_31b_worker PUBLIC ${link_libraries})
 
-# Standalone C++ DFlash benchmark runner using the Module API.
-add_executable(dflash_cpp_driver dflash_cpp_driver.cpp)
-target_include_directories(
-  dflash_cpp_driver PUBLIC ${_common_include_directories} ${_json_include}
-)
-target_link_libraries(dflash_cpp_driver PUBLIC ${link_libraries})
-
 if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
   target_link_options_gc_sections(gemma4_31b_runner)
   if(NOT APPLE AND NOT MSVC)
@@ -95,7 +88,6 @@ endif()
 if(TARGET mlxdelegate)
   executorch_target_copy_mlx_metallib(gemma4_31b_runner)
   executorch_target_copy_mlx_metallib(gemma4_31b_worker)
-  executorch_target_copy_mlx_metallib(dflash_cpp_driver)
 endif()
 
 if(EXECUTORCH_BUILD_CUDA)