Delete functorch C extension entirely. (pytorch#163340)

Signed-off-by: Edward Yang <[email protected]>

Pull Request resolved: pytorch#163340
Approved by: https://github.com/aorenste, https://github.com/wdvr, https://github.com/albanD, https://github.com/malfet

Author: ezyang

BUILD.bazel

@@ -832,36 +832,6 @@ pybind_extension(
     ],
 )
 
-cc_library(
-    name = "functorch",
-    hdrs = glob([
-        "functorch/csrc/dim/*.h",
-    ]),
-    srcs = glob([
-        "functorch/csrc/dim/*.cpp",
-    ]),
-    deps = [
-        ":aten_nvrtc",
-        ":torch_python",
-        "@pybind11",
-    ],
-)
-
-pybind_extension(
-    name = "functorch/_C",
-    copts=[
-        "-DTORCH_EXTENSION_NAME=_C"
-    ],
-    srcs = [
-        "functorch/csrc/init_dim_only.cpp",
-    ],
-    deps = [
-        ":functorch",
-        ":torch_python",
-        ":aten_nvrtc",
-    ],
-)
-
 cc_binary(
     name = "torch/bin/torch_shm_manager",
     srcs = [
@@ -902,7 +872,6 @@ py_library(
     ],
     data = [
         ":torch/_C.so",
-        ":functorch/_C.so",
         ":torch/bin/torch_shm_manager",
     ],
 )

CMakeLists.txt

@@ -1390,10 +1390,6 @@ endif()
 include(cmake/Summary.cmake)
 caffe2_print_configuration_summary()
 
-if(BUILD_FUNCTORCH)
-  add_subdirectory(functorch)
-endif()
-
 # Parse custom debug info
 if(DEFINED USE_CUSTOM_DEBINFO)
   string(REPLACE ";" " " SOURCE_FILES "${USE_CUSTOM_DEBINFO}")

functorch/.gitignore

@@ -3,7 +3,6 @@ dist/
 functorch.egg-info/
 *__pycache__*
 functorch/version.py
-functorch/_C.so
 .gdbinit
 t.py
 .vscode/