remove Broken link conf

not found
closes #7600

Author: JuanPabloDiaz

conferences/2025/networking.json

@@ -1,14 +1,4 @@
 [
-  {
-    "name": "Peredelanoconf Berlin",
-    "url": "https://peredelanoconf.com/berlin",
-    "startDate": "2025-01-25",
-    "endDate": "2025-01-25",
-    "city": "Berlin",
-    "country": "Germany",
-    "twitter": "@peredelano_conf",
-    "locales": "RU,UA,BY"
-  },
   {
     "name": "Unhacked International CyberSecurity",
     "url": "https://momentera.org/conferences/unhacked-conference",