Remove SetWalletFlag from WalletStorage

SetWalletFlag is unused.

Does not change any behavior

Author: achow101

src/wallet/scriptpubkeyman.h

@@ -28,7 +28,6 @@ class WalletStorage
     virtual const std::string GetDisplayName() const = 0;
     virtual WalletDatabase& GetDatabase() = 0;
     virtual bool IsWalletFlagSet(uint64_t) const = 0;
-    virtual void SetWalletFlag(uint64_t) = 0;
     virtual void UnsetWalletFlagWithDB(WalletBatch&, uint64_t) = 0;
     virtual bool CanSupportFeature(enum WalletFeature) const = 0;
     virtual void SetMinVersion(enum WalletFeature, WalletBatch* = nullptr, bool = false) = 0;

src/wallet/wallet.h

@@ -1090,7 +1090,7 @@ class CWallet final : public WalletStorage, private interfaces::Chain::Notificat
     void BlockUntilSyncedToCurrentChain() LOCKS_EXCLUDED(cs_main, cs_wallet);
 
     /** set a single wallet flag */
-    void SetWalletFlag(uint64_t flags) override;
+    void SetWalletFlag(uint64_t flags);
 
     /** Unsets a single wallet flag */
     void UnsetWalletFlag(uint64_t flag);