* refactor: on-demand getSharedSecret()

src/helpers/BaseChatMesh.h

@@ -73,7 +73,6 @@ class BaseChatMesh : public mesh::Mesh {
 
   mesh::Packet* composeMsgPacket(const ContactInfo& recipient, uint32_t timestamp, uint8_t attempt, const char *text, uint32_t& expected_ack);
   void sendAckTo(const ContactInfo& dest, uint32_t ack_hash);
-  void ensureSharedSecretIsValid(const ContactInfo& contact);
 
 protected:
   BaseChatMesh(mesh::Radio& radio, mesh::MillisecondClock& ms, mesh::RNG& rng, mesh::RTCClock& rtc, mesh::PacketManager& mgr, mesh::MeshTables& tables)