Remove CAFFE2_USE_EXCEPTION_PTR (pytorch#147247)

The check is for older compilers and is now aways true.
Pull Request resolved: pytorch#147247
Approved by: https://github.com/janeyx99

Author: cyyever

build.bzl

@@ -19,7 +19,6 @@ def define_targets(rules):
             "CAFFE2_BUILD_SHARED_LIBS",
             "CAFFE2_PERF_WITH_AVX",
             "CAFFE2_PERF_WITH_AVX2",
-            "CAFFE2_USE_EXCEPTION_PTR",
             "CAFFE2_USE_CUDNN",
             "USE_MKLDNN",
             "CAFFE2_USE_ITT",

caffe2/core/macros.h.in

@@ -13,7 +13,6 @@
 #cmakedefine CAFFE2_PERF_WITH_AVX2
 #cmakedefine CAFFE2_THREADPOOL_MAIN_IMBALANCE
 #cmakedefine CAFFE2_THREADPOOL_STATS
-#cmakedefine CAFFE2_USE_EXCEPTION_PTR
 #cmakedefine CAFFE2_USE_ACCELERATE
 #cmakedefine CAFFE2_USE_CUDNN
 #cmakedefine CAFFE2_USE_EIGEN_FOR_BLAS
@@ -57,7 +56,6 @@
   {"HAS_MKL_SGEMM_PACK", "${CAFFE2_HAS_MKL_SGEMM_PACK}"}, \
   {"PERF_WITH_AVX", "${CAFFE2_PERF_WITH_AVX}"}, \
   {"PERF_WITH_AVX2", "${CAFFE2_PERF_WITH_AVX2}"}, \
-  {"USE_EXCEPTION_PTR", "${CAFFE2_USE_EXCEPTION_PTR}"}, \
   {"USE_ACCELERATE", "${CAFFE2_USE_ACCELERATE}"}, \
   {"USE_EIGEN_FOR_BLAS", "${CAFFE2_USE_EIGEN_FOR_BLAS}"}, \
   {"USE_LITE_PROTO", "${CAFFE2_USE_LITE_PROTO}"}, \

cmake/MiscCheck.cmake

@@ -2,8 +2,6 @@ include(CheckCXXSourceCompiles)
 include(CheckCXXCompilerFlag)
 include(CMakePushCheckState)
 
-set(CAFFE2_USE_EXCEPTION_PTR 1)
-
 # ---[ Check if we want to turn off deprecated warning due to glog.
 if(USE_GLOG)
   cmake_push_check_state(RESET)