Do not use https anymore to connect to workflow

src/main/java/org/hbp/mip/controllers/MiningApi.java

@@ -10,13 +10,10 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
-import javax.net.ssl.HttpsURLConnection;
-import javax.net.ssl.SSLContext;
-import javax.net.ssl.TrustManager;
-import javax.net.ssl.X509TrustManager;
 import java.io.BufferedReader;
 import java.io.DataOutputStream;
 import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
 import java.net.URL;
 
 @RestController
@@ -44,9 +41,7 @@ public class MiningApi {
     private static int sendPost(String url, String query, StringBuilder resp) throws Exception {
 
         URL obj = new URL(url);
-        HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
-        // TODO: Remove this line for security
-        allowInsecureConnection(con);
+        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
 
         con.setRequestMethod("POST");
         con.addRequestProperty("Content-Type", "application/json");
@@ -80,26 +75,4 @@ public class MiningApi {
         return respCode;
     }
 
-    private static void allowInsecureConnection(HttpsURLConnection con) {
-        TrustManager[] trustAllCerts = new TrustManager[]{
-                new X509TrustManager() {
-                    public java.security.cert.X509Certificate[] getAcceptedIssuers() {
-                        return null;
-                    }
-                    public void checkClientTrusted(
-                            java.security.cert.X509Certificate[] certs, String authType) {
-                    }
-                    public void checkServerTrusted(
-                            java.security.cert.X509Certificate[] certs, String authType) {
-                    }
-                }
-        };
-
-        try {
-            SSLContext sc = SSLContext.getInstance("SSL");
-            sc.init(null, trustAllCerts, new java.security.SecureRandom());
-            con.setSSLSocketFactory(sc.getSocketFactory());
-        } catch (Exception ignored) {
-        }
-    }
 }