remove eclint

eclint is dead https://github.com/jedmao/eclint/issues/226#issuecomment-689193653

lib/tasks/lint.rake

@@ -3,6 +3,5 @@ task :lint do
   sh "bundle exec haml-lint app/views/"
   sh "bundle exec scss-lint app/assets/stylesheets/"
   sh "bundle exec brakeman --no-pager"
-  sh "yarn lint:ec"
   sh "yarn lint:js"
 end

package.json

@@ -42,7 +42,6 @@
   "devDependencies": {
     "@2fd/graphdoc": "^2.4.0",
     "babel-eslint": "^10.1.0",
-    "eclint": "^2.8.1",
     "eslint": "^7.15.0",
     "eslint-config-prettier": "^7.0.0",
     "eslint-plugin-prettier": "^3.2.0",
@@ -54,7 +53,6 @@
     "webpack-dev-server": "^3.11.0"
   },
   "scripts": {
-    "lint:ec": "eclint check $({ git ls-files | grep -v app/graphql/schema.graphql ; find vendor -type f ; echo 'db/schema.rb' ; } | sort | uniq -u)",
     "lint:js": "eslint ./app/javascript ./app/assets/javascripts ./config/webpack",
     "webpack:build": "NODE_ENV=production bin/webpack",
     "graphql:docs:build": "graphdoc --force",