Simplify further--online set/modify minimumOnline_ during

online deletion.

src/ripple/app/misc/SHAMapStore.h

@@ -73,13 +73,13 @@ class SHAMapStore
         This defines the lower bound for attempting to acquire historical
         ledgers over the peer to peer network.
 
-        When the process starts, it is set to that of the minimum persisted
-        in the ledger database, if any. If online_delete is enabled, then
-        each time online_delete executes, just prior to clearing SQL databases
-        of historical ledgers, move the value forward to one past the greatest
-        ledger being deleted. This minimizes fetching of ledgers that are in
-        the process of being deleted. Without online_delete, this value is
-        always the minimum value persisted in the ledger database, if any.
+        If online_delete is enabled, then each time online_delete executes
+        and just prior to clearing SQL databases of historical ledgers,
+        move the value forward to one past the greatest ledger being deleted.
+        This minimizes fetching of ledgers that are in the process of being
+        deleted. Without online_delete or before online_delete is
+        executed, this value is always the minimum value persisted in the
+        ledger database, if any.
 
         @return The minimum ledger sequence to keep online based on the
             description above. If not set, then an unseated optional.

src/ripple/app/misc/SHAMapStoreImp.cpp

@@ -333,12 +333,6 @@ SHAMapStoreImp::run()
     if (advisoryDelete_)
         canDelete_ = state_db_.getCanDelete();
 
-    // Don't acquire ledgers from the network older than
-    // the earliest persisted, if any.
-    auto const minSql = app_.getLedgerMaster().minSqlSeq();
-    if (minSql.has_value())
-        minimumOnline_ = *minSql;
-
     while (true)
     {
         healthy_ = true;