scripted-diff: refactor: wallet: Delete IsCrypted

This function is a duplicate of HasEncryptionKeys().

-BEGIN VERIFY SCRIPT-
sed -i '/bool IsCrypted() const;/d' src/wallet/wallet.h
sed -i '/^bool CWallet::IsCrypted() const$/,/^}$/{/^}$/N;d;}' src/wallet/wallet.cpp
sed -i --regexp-extended 's/IsCrypted\(\)/HasEncryptionKeys()/g' $(git ls-files '*.cpp' '*.h')
-END VERIFY SCRIPT-

src/wallet/interfaces.cpp

@@ -140,7 +140,7 @@ public:
     {
         return m_wallet->EncryptWallet(wallet_passphrase);
     }
-    bool isCrypted() override { return m_wallet->IsCrypted(); }
+    bool isCrypted() override { return m_wallet->HasEncryptionKeys(); }
     bool lock() override { return m_wallet->Lock(); }
     bool unlock(const SecureString& wallet_passphrase) override { return m_wallet->Unlock(wallet_passphrase); }
     bool isLocked() override { return m_wallet->IsLocked(); }
@@ -623,7 +623,7 @@ public:
     {
         auto wallets{GetWallets(m_context)};
         auto it = std::find_if(wallets.begin(), wallets.end(), [&](std::shared_ptr<CWallet> w){ return w->GetName() == wallet_name; });
-        if (it != wallets.end()) return (*it)->IsCrypted();
+        if (it != wallets.end()) return (*it)->HasEncryptionKeys();
 
         // Unloaded wallet, read db
         DatabaseOptions options;