Merge #11044: [wallet] Keypool topup cleanups

67ceff4 [wallet] Add logging to MarkReserveKeysAsUsed (John Newbery)
1221f60 [wallet] Remove keypool_topup_cleanups (John Newbery)

Pull request description:

  A couple of minor cleanups suggested by @ryanofsky here: https://github.com/bitcoin/bitcoin/pull/11022#pullrequestreview-55598940

  Does not affect functionality. Not required for v0.15.

Tree-SHA512: d8d0698fd26ea49a4157e68669d5511095760c3a1ecfa3f917e3f273efbafb55c51a202d677614216eae3f796b6e8d17506b2ec2d4799a94f18981b396e65eec

src/wallet/wallet.cpp

@@ -3668,15 +3668,11 @@ void CWallet::MarkReserveKeysAsUsed(int64_t keypool_id)
             m_pool_key_to_index.erase(keypool.vchPubKey.GetID());
         }
         walletdb.ErasePool(index);
+        LogPrintf("keypool index %d removed\n", index);
         it = setKeyPool->erase(it);
     }
 }
 
-bool CWallet::HasUnusedKeys(int min_keys) const
-{
-    return setExternalKeyPool.size() >= min_keys && (setInternalKeyPool.size() >= min_keys || !CanSupportFeature(FEATURE_HD_SPLIT));
-}
-
 void CWallet::GetScriptForMining(std::shared_ptr<CReserveScript> &script)
 {
     std::shared_ptr<CReserveKey> rKey = std::make_shared<CReserveKey>(this);

src/wallet/wallet.h

@@ -984,8 +984,6 @@ public:
      */
     void MarkReserveKeysAsUsed(int64_t keypool_id);
     const std::map<CKeyID, int64_t>& GetAllReserveKeys() const { return m_pool_key_to_index; }
-    /** Does the wallet have at least min_keys in the keypool? */
-    bool HasUnusedKeys(int min_keys) const;
 
     std::set< std::set<CTxDestination> > GetAddressGroupings();
     std::map<CTxDestination, CAmount> GetAddressBalances();