Revert " Price Oracle (XLS-47d): (XRPLF#4789) (XRPLF#4789)"

This reverts commit e718378 in order to add input validation
in get_aggregate_price and make consistent error handling in Oracle
API's.

Builds/CMake/RippledCore.cmake

@@ -149,7 +149,6 @@ target_sources (xrpl_core PRIVATE
   src/ripple/protocol/impl/STArray.cpp
   src/ripple/protocol/impl/STBase.cpp
   src/ripple/protocol/impl/STBlob.cpp
-  src/ripple/protocol/impl/STCurrency.cpp
   src/ripple/protocol/impl/STInteger.cpp
   src/ripple/protocol/impl/STLedgerEntry.cpp
   src/ripple/protocol/impl/STObject.cpp
@@ -614,7 +613,6 @@ target_sources (rippled PRIVATE
   src/ripple/app/tx/impl/CreateOffer.cpp
   src/ripple/app/tx/impl/CreateTicket.cpp
   src/ripple/app/tx/impl/DeleteAccount.cpp
-  src/ripple/app/tx/impl/DeleteOracle.cpp
   src/ripple/app/tx/impl/DepositPreauth.cpp
   src/ripple/app/tx/impl/DID.cpp
   src/ripple/app/tx/impl/Escrow.cpp
@@ -628,7 +626,6 @@ target_sources (rippled PRIVATE
   src/ripple/app/tx/impl/PayChan.cpp
   src/ripple/app/tx/impl/Payment.cpp
   src/ripple/app/tx/impl/SetAccount.cpp
-  src/ripple/app/tx/impl/SetOracle.cpp
   src/ripple/app/tx/impl/SetRegularKey.cpp
   src/ripple/app/tx/impl/SetSignerList.cpp
   src/ripple/app/tx/impl/SetTrust.cpp
@@ -764,7 +761,6 @@ target_sources (rippled PRIVATE
   src/ripple/rpc/handlers/FetchInfo.cpp
   src/ripple/rpc/handlers/GatewayBalances.cpp
   src/ripple/rpc/handlers/GetCounts.cpp
-  src/ripple/rpc/handlers/GetAggregatePrice.cpp
   src/ripple/rpc/handlers/LedgerAccept.cpp
   src/ripple/rpc/handlers/LedgerCleanerHandler.cpp
   src/ripple/rpc/handlers/LedgerClosed.cpp
@@ -878,7 +874,6 @@ if (tests)
     src/test/app/NFTokenDir_test.cpp
     src/test/app/OfferStream_test.cpp
     src/test/app/Offer_test.cpp
-    src/test/app/Oracle_test.cpp
     src/test/app/OversizeMeta_test.cpp
     src/test/app/Path_test.cpp
     src/test/app/PayChan_test.cpp
@@ -1003,7 +998,6 @@ if (tests)
     src/test/jtx/impl/AMMTest.cpp
     src/test/jtx/impl/Env.cpp
     src/test/jtx/impl/JSONRPCClient.cpp
-    src/test/jtx/impl/Oracle.cpp
     src/test/jtx/impl/TestHelpers.cpp
     src/test/jtx/impl/WSClient.cpp
     src/test/jtx/impl/acctdelete.cpp
@@ -1131,7 +1125,6 @@ if (tests)
     src/test/rpc/DeliveredAmount_test.cpp
     src/test/rpc/Feature_test.cpp
     src/test/rpc/GatewayBalances_test.cpp
-    src/test/rpc/GetAggregatePrice_test.cpp
     src/test/rpc/GetCounts_test.cpp
     src/test/rpc/JSONRPC_test.cpp
     src/test/rpc/KeyGeneration_test.cpp

src/ripple/app/tx/impl/DeleteAccount.cpp

@@ -19,7 +19,6 @@
 
 #include <ripple/app/tx/impl/DID.h>
 #include <ripple/app/tx/impl/DeleteAccount.h>
-#include <ripple/app/tx/impl/DeleteOracle.h>
 #include <ripple/app/tx/impl/DepositPreauth.h>
 #include <ripple/app/tx/impl/SetSignerList.h>
 #include <ripple/app/tx/impl/details/NFTokenUtils.h>
@@ -147,18 +146,6 @@ removeDIDFromLedger(
     return DIDDelete::deleteSLE(view, sleDel, account, j);
 }
 
-TER
-removeOracleFromLedger(
-    Application&,
-    ApplyView& view,
-    AccountID const& account,
-    uint256 const&,
-    std::shared_ptr<SLE> const& sleDel,
-    beast::Journal j)
-{
-    return DeleteOracle::deleteOracle(view, sleDel, account, j);
-}
-
 // Return nullptr if the LedgerEntryType represents an obligation that can't
 // be deleted.  Otherwise return the pointer to the function that can delete
 // the non-obligation
@@ -179,8 +166,6 @@ nonObligationDeleter(LedgerEntryType t)
             return removeNFTokenOfferFromLedger;
         case ltDID:
             return removeDIDFromLedger;
-        case ltORACLE:
-            return removeOracleFromLedger;
         default:
             return nullptr;
     }

src/ripple/app/tx/impl/InvariantCheck.cpp

@@ -392,7 +392,6 @@ LedgerEntryTypesMatch::visitEntry(
             case ltXCHAIN_OWNED_CLAIM_ID:
             case ltXCHAIN_OWNED_CREATE_ACCOUNT_CLAIM_ID:
             case ltDID:
-            case ltORACLE:
                 break;
             default:
                 invalidTypeAdded_ = true;