fix wrong execute date

lib/presentation/screens/actions/crop_status/sc_edit_action_crop_status.dart

   void initState() {
     super.initState();
     changeFileController.initValue();
-    //UPDATE
-    if (_cropStatus != null) {
-      try {
-        executeTime = DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'")
-            .parse(_cropStatus.executeDate);
-      } catch (_) {}
-    } else {
-      //ADD NEW
-      var parsedExecuteDate =
-          DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").format(executeTime);
-      _cropStatus.executeDate = "$parsedExecuteDate";
-    }
+    var parsedExecuteDate =
+        DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").format(executeTime);
+    _cropStatus.executeDate = "$parsedExecuteDate";
     executeTimeView = DateFormat("dd/MM/yyyy HH:mm").format(executeTime);
     _cropStatus.cropId = widget.cropId;
   }

lib/presentation/screens/actions/environment_update/sc_edit_action_environment_update.dart

   void initState() {
     super.initState();
     changeFileController.initValue();
-    //UPDATE
-    if (_environment != null) {
-      try {
-        executeTime = DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'")
-            .parse(_environment.executeDate);
-      } catch (_) {}
-    } else {
-      //ADD NEW
-      var parsedExecuteDate =
-          DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").format(executeTime);
-      _environment.executeDate = "$parsedExecuteDate";
-    }
+    var parsedExecuteDate =
+        DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").format(executeTime);
+    _environment.executeDate = "$parsedExecuteDate";
     executeTimeView = DateFormat("dd/MM/yyyy HH:mm").format(executeTime);
     _environment.cropId = widget.cropId;
   }

lib/presentation/screens/actions/nursery/sc_edit_action_nursery.dart

     changeSupply.initValue();
     changeFileController.initValue();
     _nursery.nurseryDetail = new List<NurseryDetail>();
-    //UPDATE
-    if (_nursery.id != null) {
-      try {
-        executeTime =
-            DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").parse(_nursery.executeDate);
-      } catch (_) {}
-    } else {
-      //ADD NEW
-      var parsedExecuteDate =
-          DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").format(executeTime);
-      _nursery.executeDate = "$parsedExecuteDate";
-    }
+    var parsedExecuteDate =
+        DateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").format(executeTime);
+    _nursery.executeDate = "$parsedExecuteDate";
     executeTimeView = DateFormat("dd/MM/yyyy HH:mm").format(executeTime);
     _nursery.cropId = widget.cropId;
   }