Fix a few notices

lib/models/advanced_group_info.dart

@@ -37,8 +37,7 @@ class AdvancedGroupInfo extends Group implements LikeElement {
     required this.userLike,
     required this.conversations,
     required this.isForezGroup,
-  })  : assert(isForezGroup != null),
-        super(
+  }) : super(
             id: id,
             name: name,
             iconURL: iconURL,
@@ -53,8 +52,7 @@ class AdvancedGroupInfo extends Group implements LikeElement {
   @override
   LikesType likeType = LikesType.GROUP;
 
-  get hasURL => url != null && url.isNotEmpty && url != "null";
+  get hasURL => url.isNotEmpty && url != "null";
 
-  get hasDescription =>
-      description != null && description.isNotEmpty && description != "null";
+  get hasDescription => description.isNotEmpty && description != "null";
 }

lib/models/api_request.dart

@@ -32,21 +32,15 @@ class APIRequest {
   Map<String, File> files = Map();
   Map<String, BytesFile?> bytesFiles = Map();
 
-  APIRequest({required this.uri, this.needLogin = false, this.args})
-      : assert(uri != null),
-        assert(needLogin != null) {
+  APIRequest({required this.uri, this.needLogin = false, this.args}) {
     if (this.args == null) this.args = Map();
   }
 
-  APIRequest.withLogin(this.uri, {this.args})
-      : needLogin = true,
-        assert(uri != null) {
+  APIRequest.withLogin(this.uri, {this.args}) : needLogin = true {
     if (args == null) this.args = Map();
   }
 
-  APIRequest.withoutLogin(this.uri, {this.args})
-      : needLogin = false,
-        assert(uri != null) {
+  APIRequest.withoutLogin(this.uri, {this.args}) : needLogin = false {
     if (args == null) this.args = Map();
   }
 

lib/models/call_config.dart

@@ -1,5 +1,3 @@
-
-
 /// Call configuration
 ///
 /// @author Pierre Hubert
@@ -9,7 +7,7 @@ class CallConfig {
 
   const CallConfig({
     required this.iceServers,
-  }) : assert(iceServers != null);
+  });
 
   /// Turn this call configuration into the right for the WebRTC plugin
   Map<String, dynamic> get pluginConfig => {

lib/models/conversation_message.dart

@@ -112,8 +112,7 @@ class ConversationServerMessage {
     required this.userAdded,
     required this.userWhoRemoved,
     required this.userRemoved,
-  })  : assert(type != null),
-        assert(userID != null ||
+  })  : assert(userID != null ||
             (type != ConversationServerMessageType.USER_CREATED_CONVERSATION &&
                 type != ConversationServerMessageType.USER_LEFT_CONV)),
         assert((userWhoAdded != null && userAdded != null) ||

lib/models/survey.dart

@@ -24,17 +24,9 @@ class Survey {
     required this.userChoice,
     required this.choices,
     required this.allowNewChoicesCreation,
-  })  : assert(id != null),
-        assert(userID != null),
-        assert(postID != null),
-        assert(creationTime != null),
-        assert(question != null),
-        assert(userChoice != null),
-        assert(choices != null),
-        assert(choices.length > 0),
-        assert(allowNewChoicesCreation != null);
+  }) : assert(choices.length > 0);
 
-  bool get hasResponded => this.userChoice != null && this.userChoice > 0;
+  bool get hasResponded => this.userChoice > 0;
 
   bool get hasResponses =>
       this.choices.where((f) => f.responses > 0).length > 0;