For rc.newwanip, it's redundant to kill specific states before killing all states. For ppp-linkup, state killing is already handled by calling filter_configure_sync() in rc.newwanip which is called by check_reload_status.
Related issues
Bug #12942: Code to kill states for old gateway when reconnecting an interface is incorrect
Remove old state killing colde. Fix #12942
For rc.newwanip, it's redundant to kill specific states before killing
all states. For ppp-linkup, state killing is already handled by calling
filter_configure_sync() in rc.newwanip which is called by
check_reload_status.