fix boolean comparison, remove flow-types packages

.babelrc

@@ -1,8 +1,7 @@
 {
   "presets": [
     "@babel/preset-env",
-    "@babel/preset-react",
-    "@babel/preset-flow"
+    "@babel/preset-react"
   ],
   "env": {
     "test": {

package.json

@@ -14,13 +14,11 @@
     "instrument": false
   },
   "scripts": {
-    "flow": "flow; test $? -eq 0 -o $? -eq 2",
-    "flow-typed": "flow-typed install",
     "lint": "eslint src",
     "serve": "webpack serve",
     "start": "node scripts/start.js",
     "compile": "node scripts/compile.js",
-    "precommit": "npm-run-all flow lint",
+    "precommit": "npm-run-all lint",
     "prepush": "npm-run-all test",
     "test": "mocha --require @babel/register --require ts-node/register --require tsconfig-paths/register --require src/test.ts \"src/**/*spec.ts\"",
     "test:coverage": "cross-env NODE_ENV=test nyc --reporter=lcov --reporter=text --require ts-node/register --require tsconfig-paths/register mocha \"src/**/*spec.ts\" --exit",
@@ -79,7 +77,6 @@
     "@babel/plugin-proposal-class-properties": "^7.18.6",
     "@babel/polyfill": "^7.12.1",
     "@babel/preset-env": "^7.5.5",
-    "@babel/preset-flow": "^7.23.3",
     "@babel/preset-react": "^7.23.3",
     "@babel/register": "^7.23.7",
     "@hot-loader/react-dom": "17.0.2",
@@ -107,11 +104,9 @@
     "enzyme": "^3.10.0",
     "enzyme-adapter-react-16": "^1.14.0",
     "eslint": "^8.56.0",
-    "eslint-plugin-flowtype": "^8.0.3",
     "eslint-plugin-react": "^7.14.3",
     "favicons-webpack-plugin": "^6.0.1",
     "file-loader": "^6.2.0",
-    "flow-typed": "^3.9.0",
     "fs-extra": "^11.2.0",
     "html-webpack-plugin": "^5.6.0",
     "json-loader": "^0.5.7",

src/leases/components/leaseSections/invoice/forms/DebtCollectionForm.tsx

@@ -80,8 +80,7 @@ const renderNotes = ({
       return <NewCollectionNote key={index} field={field} onCancel={handleCancel} onSave={handleSave} />;
     })}
       <Authorization allow={hasPermissions(usersPermissions, UsersPermissions.ADD_COLLECTIONNOTE)}>
-        {/** @ts-ignore: Operator '<' cannot be applied to types 'boolean' and 'number' */}
-        {!!fields.length < 1 && <AddButtonThird label='Lisää huomautus' onClick={handleAdd} />}
+        {fields.length === 0 && <AddButtonThird label='Lisää huomautus' onClick={handleAdd} />}
       </Authorization>
     </Fragment>;
 };