Remove needless ARROW_GANDIVA_PC_CXX_FLAGS

Author: kou

ci/scripts/jni_manylinux_build.sh

@@ -53,8 +53,6 @@ if [ "${ARROW_USE_CCACHE}" == "ON" ]; then
 fi
 
 github_actions_group_begin "Building Arrow C++ libraries"
-gcc_toolset_version="$(rpm -qa "gcc-toolset-*-gcc" --queryformat '%{VERSION}' | grep -o "^[0-9]*")"
-gcc_toolset_include_cpp="/opt/rh/gcc-toolset-${gcc_toolset_version}/root/usr/include/c++/${gcc_toolset_version}"
 : "${ARROW_ACERO:=ON}"
 export ARROW_ACERO
 : "${ARROW_BUILD_TESTS:=OFF}"
@@ -76,8 +74,6 @@ export ARROW_ORC
 : "${VCPKG_ROOT:=/opt/vcpkg}"
 : "${VCPKG_FEATURE_FLAGS:=-manifests}"
 : "${VCPKG_TARGET_TRIPLET:=${VCPKG_DEFAULT_TRIPLET:-x64-linux-static-${CMAKE_BUILD_TYPE}}}"
-: "${GANDIVA_CXX_FLAGS:=-isystem;${gcc_toolset_include_cpp};-isystem;${gcc_toolset_include_cpp}/x86_64-redhat-linux;-lpthread}"
-
 export ARROW_TEST_DATA="${arrow_dir}/testing/data"
 export PARQUET_TEST_DATA="${arrow_dir}/cpp/submodules/parquet-testing/data"
 export AWS_EC2_METADATA_DISABLED=TRUE
@@ -95,7 +91,6 @@ cmake \
   -DARROW_SUBSTRAIT="${ARROW_DATASET}" \
   -DARROW_DEPENDENCY_SOURCE="VCPKG" \
   -DARROW_DEPENDENCY_USE_SHARED=OFF \
-  -DARROW_GANDIVA_PC_CXX_FLAGS="${GANDIVA_CXX_FLAGS}" \
   -DARROW_GANDIVA="${ARROW_GANDIVA}" \
   -DARROW_GCS="${ARROW_GCS}" \
   -DARROW_JEMALLOC="${ARROW_JEMALLOC}" \