Comment out flutter_webview plugin

It wasn't being used. It was just an experiment which was never shipped.
Plus it hasn't been ported to null safety

lib/main_webview.dart

@@ -1,3 +1,5 @@
+/*
+
 import 'package:flutter/material.dart';
 
 import 'package:gitjournal/widgets/katex_widget.dart';
@@ -37,3 +39,4 @@ class MyWidget extends StatelessWidget {
     );
   }
 }
+*/

lib/widgets/katex_widget.dart

@@ -1,3 +1,5 @@
+/*
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
@@ -124,3 +126,4 @@ html2canvas(document.body, {backgroundColor: 'rgba(0, 0, 0, 0)', removeContainer
     return Image.file(File(imagePath));
   }
 }
+*/

pubspec.lock

@@ -415,13 +415,6 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  flutter_webview_plugin:
-    dependency: "direct dev"
-    description:
-      name: flutter_webview_plugin
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.11"
   font_awesome_flutter:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -84,7 +84,7 @@ dev_dependencies:
   benchmark_harness: any
   bonsoir: ^0.1.2+2
   flutter_launcher_icons: ^0.9.0
-  flutter_webview_plugin: ^0.3.11
+  # flutter_webview_plugin: ^0.3.11
   import_sorter: ^4.2.2
   multicast_dns: ^0.2.2
   #screenshots: ^2.1.1