remove no-op C10_DISABLE_NUMA preprocessor flag (#98243)

Nothing reads this, so setting it does nothing.

Differential Revision: [D44642070](https://our.internmc.facebook.com/intern/diff/D44642070/)

**NOTE FOR REVIEWERS**: This PR has internal Meta-specific changes or comments, please review them on [Phabricator](https://our.internmc.facebook.com/intern/diff/D44642070/)!
Pull Request resolved: https://github.com/pytorch/pytorch/pull/98243
Approved by: https://github.com/PaliC

c10/BUCK.oss

@@ -36,7 +36,6 @@ cxx_library(
         '-DC10_USING_CUSTOM_GENERATED_MACROS',
         '-DC10_USE_GLOG',
         '-DC10_USE_MINIMAL_GLOG',
-        '-DC10_DISABLE_NUMA',
         '-DC10_MOBILE',
         '-fexceptions',
         '-Wno-global-constructors'

c10/ovrsource_defs.bzl

@@ -101,7 +101,6 @@ def define_ovrsource_targets():
 
     common_c10_cmake_defines = [
         ("#cmakedefine C10_BUILD_SHARED_LIBS", ""),
-        ("#cmakedefine C10_DISABLE_NUMA", ""),
         ("#cmakedefine C10_USE_NUMA", ""),
         ("#cmakedefine C10_USE_MSVC_STATIC_RUNTIME", ""),
     ]