[CI]: Drop dev channel (#955)

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        flutter_version: [dev, beta, stable]
+        flutter_version: [stable, beta]
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - uses: actions/checkout@v2

tool/flutter_ci_script_dev.sh

@@ -1,43 +0,0 @@
-#!/bin/bash
-
-set -e
-
-DIR="${BASH_SOURCE%/*}"
-source "$DIR/flutter_ci_script_shared.sh"
-
-flutter doctor -v
-
-declare -ar PROJECT_NAMES=(
-    "add_to_app/books/flutter_module_books"
-    "add_to_app/fullscreen/flutter_module"
-    "add_to_app/multiple_flutters/multiple_flutters_module"
-    "add_to_app/plugin/flutter_module_using_plugin"
-    "add_to_app/prebuilt_module/flutter_module"
-    "android_splash_screen"
-    "animations"
-    "experimental/desktop_photo_search"
-    "experimental/federated_plugin/federated_plugin"
-    "experimental/web_dashboard"
-    "experimental/linting_tool"
-    "flutter_maps_firestore"
-    "form_app"
-    "infinite_list"
-    "ios_app_clip"
-    "isolate_example"
-    "jsonexample"
-    "navigation_and_routing"
-    "null_safety/null_safe_app"
-    "null_safety/null_unsafe_app"
-    "place_tracker"
-    "platform_channels"
-    "platform_design"
-    "platform_view_swift"
-    "provider_counter"
-    "provider_shopper"
-    "testing_app"
-    "veggieseasons"
-)
-
-ci_projects "dev" "${PROJECT_NAMES[@]}"
-
-echo "-- Success --"