AppleTLSSession: Remove unused private member

src/AppleTLSSession.cc

@@ -294,8 +294,7 @@ TLSSession* TLSSession::make(TLSContext* ctx)
 }
 
 AppleTLSSession::AppleTLSSession(AppleTLSContext* ctx)
-  : ctx_(ctx),
-    sslCtx_(nullptr),
+  : sslCtx_(nullptr),
     sockfd_(0),
     state_(st_constructed),
     lastError_(noErr),

src/AppleTLSSession.h

@@ -112,7 +112,6 @@ private:
     return ((AppleTLSSession*)conn)->sockRead(data, len);
   }
 
-  AppleTLSContext *ctx_;
   SSLContextRef sslCtx_;
   sock_t sockfd_;
   state_t state_;