fix(ci): remove git reset command from Jenkinsfile

- By default, eNB_CommitID is set as 'develop' in the config
       - When OAI-FLEXRIC-RAN-Integration-Test is triggered by upstream FlexRIC push events, it takes `develop`
       - Triggered by RAN takes commit SHA where `origin/SHA` does not work

ci-scripts/Jenkinsfile

@@ -115,7 +115,6 @@ pipeline {
             } else {
               sh "git fetch"
               sh "git checkout -f ${commitID}"
-              sh "git reset --hard origin/${commitID}"
             }
           } else {
             echo "\u274C Some parameters are missing"