Removed conditional in install_all_and_run_tests.sh

Removed the conditional block that checked for Python 3.6 and installed dependencies differently.

Author: ewanek1

scripts/install_all_and_run_tests.sh

@@ -16,12 +16,7 @@ pip uninstall python-lambda
 test_target="$1"
 python_version=`python --version | awk '{print $2}'`
 
-if [ ${python_version:0:3} == "3.6" ]
-then
-  pip install -U -r requirements.txt
-else
-  pip install -e .
-fi
+pip install -e .
 
 if [[ $test_target != "" ]]
 then