Revert "Install pyparsing-2.2.0 before building workspace "

This reverts commit 3982ee0.

Author: Jiten Thakkar

robomaker-sample-app-ci/src/aws-robomaker-sample-application-ci.ts

@@ -132,10 +132,6 @@ async function bundle() {
   await exec.exec("rm", ["-rf", "bundle"], getWorkingDirExecOptions());  // github actions have been failing with no disk space
 }
 
-async function installPyparsing() {
-  await exec.exec("bash", ["-c", `pip3 install --install-option="--prefix=/home/pypackages" pyparsing==2.0.2`, getWorkingDirExecOptions()]);
-}
-
 async function run() {
   let delay_ms = 1000 * MINIMUM_BACKOFF_TIME_SECONDS;
   console.log(`ROS_DISTRO: ${ROS_DISTRO}`);
@@ -155,8 +151,6 @@ async function run() {
       if (GENERATE_SOURCES == 'true') {
         await prepare_sources();
       }
-      # workaroung to get sample app build working
-      await installPyparsing()
       await build();
       await bundle();
       core.setOutput('ros-distro', ROS_DISTRO)