remove webimages directory

experimental/web_dashboard/pubspec.lock

@@ -42,7 +42,7 @@ packages:
       name: build
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.1"
+    version: "1.6.2"
   build_config:
     dependency: transitive
     description:
@@ -56,28 +56,28 @@ packages:
       name: build_daemon
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.6"
+    version: "2.1.7"
   build_resolvers:
     dependency: transitive
     description:
       name: build_resolvers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.2"
+    version: "1.5.3"
   build_runner:
     dependency: "direct dev"
     description:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
   build_runner_core:
     dependency: transitive
     description:
       name: build_runner_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.1.6"
+    version: "6.1.7"
   built_collection:
     dependency: transitive
     description: