remove deprecated header and unused variable

src/networking/HTTPSRequest.cpp

@@ -29,7 +29,6 @@ bool HTTPSRequest::sendRequest(std::function<void(const HTTPResponse&)> response
 	std::string host = uri->host;
 	std::string port = std::to_string(uri->port);
     char buffer[512];
-    ssize_t received;
 	int ret;
 	unsigned flags;
 

src/networking/HTTPSRequest.h

@@ -7,7 +7,6 @@
 #include <functional>
 #include <string>
 // PolarSSL
-#include <mbedtls/net.h>
 #include <mbedtls/ssl.h>
 #include <mbedtls/entropy.h>
 #include <mbedtls/ctr_drbg.h>