Remove unused field save_rollback_data

save_rollback_data is inherited from ChromeOS to persist data
after a data wipe. Android never supported this feature, remove
unused code.

Test: th
Bug: 377557752
Change-Id: I022577bb19cd27010ffe0236b2659fe7880f03c4
diff --git a/aosp/hardware_android.cc b/aosp/hardware_android.cc
index 29d742f..dd39fdd 100644
--- a/aosp/hardware_android.cc
+++ b/aosp/hardware_android.cc
@@ -213,10 +213,8 @@
   return 0;
 }
 
-bool HardwareAndroid::SchedulePowerwash(bool save_rollback_data) {
+bool HardwareAndroid::SchedulePowerwash() {
   LOG(INFO) << "Scheduling a powerwash to BCB.";
-  LOG_IF(WARNING, save_rollback_data) << "save_rollback_data was true but "
-                                      << "isn't supported.";
   string err;
   if (!update_bootloader_message({"--wipe_data", "--reason=wipe_data_from_ota"},
                                  &err)) {