remove HTTPClient

lib_standalone/HTTPClient.h

@@ -1,24 +0,0 @@
-#ifndef HTTPClient_H_
-#define HTTPClient_H_
-
-#include "WString.h"
-
-class HTTPClient {
-  public:
-    bool begin(String url) {
-        return true;
-    };
-    void end(void) {};
-    int  GET() {
-        return 200;
-    };
-    int POST(String payload) {
-        return 200;
-    };
-    void   addHeader(const String & name, const String & value, bool first = false, bool replace = true) {};
-    String getString(void) {
-        return "Hello, World!";
-    };
-};
-
-#endif /* HTTPClient_H_ */