Update learn.json

Author: Charlytoc

learn.json

@@ -10,12 +10,9 @@
         "es": "Validaciones de formularios, inputs, areas de texto (textarea), inputs de fechas, etc."
     },
     "video": {
-        "intro": {
-            "us": "https://www.youtube.com/watch?v=83HxtkBq7Yc",
+            "en": "https://www.youtube.com/watch?v=83HxtkBq7Yc",
             "en": "https://www.youtube.com/watch?v=83HxtkBq7Yc"
         },
-        "solution": null
-    },
     "difficulty": "easy",
     "language": "html",
     "skills": ["html-forms"],