chore: remove eslint-plugin-unused-imports (#9160)

`no-unused-vars` is enough

yarn.lock

@@ -699,7 +699,6 @@ __metadata:
     eslint-plugin-rxjs: "npm:^5.0.3"
     eslint-plugin-sonarjs: "npm:^3.0.1"
     eslint-plugin-unicorn: "npm:^56.0.1"
-    eslint-plugin-unused-imports: "npm:^4.1.4"
     happy-dom: "npm:^15.11.7"
     husky: "npm:^9.1.7"
     lint-staged: "npm:^15.2.11"
@@ -20600,19 +20599,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"eslint-plugin-unused-imports@npm:^4.1.4":
-  version: 4.1.4
-  resolution: "eslint-plugin-unused-imports@npm:4.1.4"
-  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
-  checksum: 10/8e987028ad925ce1e04c01dcae70adbf44c2878a8b15c4327b33a2861e471d7fe00f6fe213fbd2b936f3fcefc8ccabb0d778aa1d6e0e0387a3dc7fe150cd4ed4
-  languageName: node
-  linkType: hard
-
 "eslint-scope@npm:5.1.1, eslint-scope@npm:^5.1.1":
   version: 5.1.1
   resolution: "eslint-scope@npm:5.1.1"