[PLAT-15706] Removed chronyc requirement from preflights

Summary:
Chronyc itself is not a requirement, instead we just need the ntp service check to pass.

There are several services that can satisfy the ntp requirement, so checking specifically for chrony is
not needed.

Test Plan: ran preflight checks

Reviewers: nsingh, muthu, anijhawan

Reviewed By: anijhawan

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D39149

managed/node-agent/resources/preflight_check.sh

@@ -198,7 +198,6 @@ check_package_installed() {
 }
 
 check_binaries_installed() {
-  check_binary_installed "chronyc"
   if [[ "$is_aarch64" = false ]]; then
     check_binary_installed "azcopy" # Optional.
   fi