[MINOR] Reverting ubuntu version override (#13283)

diff --git a/azure-pipelines-20230430.yml b/azure-pipelines-20230430.yml
index af17493..d206a97 100644
--- a/azure-pipelines-20230430.yml
+++ b/azure-pipelines-20230430.yml
@@ -399,9 +399,6 @@
       - job: UT_FT_8
         displayName: UT hudi-hadoop-common & Hudi Utilities others
         timeoutInMinutes: '75'
-        # trying with ubuntu 24
-        pool:
-          vmImage: 'ubuntu-24.04'
         steps:
           - task: Docker@2
             displayName: "login to docker hub"