Remove now-unnecessary command felt analyze. (#160986)

Closes flutter/flutter#154143.

The entire engine sub-repo is now checked for Dart analysis issues, so a
separate command is not needed.

Author: matanlurey

engine/src/flutter/ci/builders/linux_web_engine_test.json

@@ -194,13 +194,6 @@
             "check-licenses"
           ],
           "script": "flutter/lib/web_ui/dev/felt"
-        },
-        {
-          "name": "web engine analysis",
-          "parameters": [
-            "analyze"
-          ],
-          "script": "flutter/lib/web_ui/dev/felt"
         }
       ]
     },

engine/src/flutter/lib/web_ui/dev/analyze.dart

@@ -6,7 +6,6 @@ import 'dart:io' as io;
 
 import 'package:args/command_runner.dart';
 
-import 'analyze.dart';
 import 'build.dart';
 import 'clean.dart';
 import 'exceptions.dart';
@@ -18,7 +17,6 @@ import 'utils.dart';
 
 CommandRunner<bool> runner =
     CommandRunner<bool>('felt', 'Command-line utility for building and testing Flutter web engine.')
-      ..addCommand(AnalyzeCommand())
       ..addCommand(BuildCommand())
       ..addCommand(CleanCommand())
       ..addCommand(RollFallbackFontsCommand())

engine/src/flutter/lib/web_ui/dev/felt.dart

@@ -117,11 +117,6 @@ class GenerateBuilderJsonCommand extends Command<bool> {
           'parameters': <String>['check-licenses'],
           'script': 'flutter/lib/web_ui/dev/felt',
         },
-        <String, dynamic>{
-          'name': 'web engine analysis',
-          'parameters': <String>['analyze'],
-          'script': 'flutter/lib/web_ui/dev/felt',
-        },
       ],
     };
   }