refactor: Add lint rules for no unused vars and unused import (#9940)

package-lock.json

@@ -82,6 +82,7 @@
         "deep-diff": "1.0.2",
         "eslint": "9.27.0",
         "eslint-plugin-expect-type": "0.6.2",
+        "eslint-plugin-unused-imports": "^4.3.0",
         "flow-bin": "0.271.0",
         "form-data": "4.0.4",
         "globals": "16.2.0",
@@ -10246,6 +10247,22 @@
         "typescript": ">=4"
       }
     },
+    "node_modules/eslint-plugin-unused-imports": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-unused-imports/-/eslint-plugin-unused-imports-4.3.0.tgz",
+      "integrity": "sha512-ZFBmXMGBYfHttdRtOG9nFFpmUvMtbHSjsKrS20vdWdbfiVYsO3yA2SGYy9i9XmZJDfMGBflZGBCm70SEnFQtOA==",
+      "dev": true,
+      "license": "MIT",
+      "peerDependencies": {
+        "@typescript-eslint/eslint-plugin": "^8.0.0-0 || ^7.0.0 || ^6.0.0 || ^5.0.0",
+        "eslint": "^9.0.0 || ^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@typescript-eslint/eslint-plugin": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/eslint-scope": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-5.1.1.tgz",
@@ -30154,6 +30171,13 @@
         "get-tsconfig": "^4.8.1"
       }
     },
+    "eslint-plugin-unused-imports": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-unused-imports/-/eslint-plugin-unused-imports-4.3.0.tgz",
+      "integrity": "sha512-ZFBmXMGBYfHttdRtOG9nFFpmUvMtbHSjsKrS20vdWdbfiVYsO3yA2SGYy9i9XmZJDfMGBflZGBCm70SEnFQtOA==",
+      "dev": true,
+      "requires": {}
+    },
     "eslint-scope": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-5.1.1.tgz",