Remove python extra cmake args

ci/travis_script_python.sh

@@ -112,7 +112,7 @@ python_version_tests() {
   # Other stuff pip install
   pip install -r requirements.txt
 
-  python setup.py build_ext --inplace --with-parquet --with-jemalloc --extra-cmake-args="-DCMAKE_CXX_STANDARD=11"
+  python setup.py build_ext --inplace --with-parquet --with-jemalloc
 
   python -c "import pyarrow.parquet"
   python -c "import pyarrow.jemalloc"