chore: remove additional yarn install in acvm_js (#2885)

Author: TomAFrench

acvm-repo/acvm_js/.gitignore

@@ -5,12 +5,3 @@ node_modules
 result
 nodejs
 web
-
-# Yarn
-.pnp.*
-.yarn/*
-!.yarn/patches
-!.yarn/plugins
-!.yarn/releases
-!.yarn/sdks
-!.yarn/versions

acvm-repo/acvm_js/.yarn/releases/yarn-3.5.1.cjs

@@ -35,7 +35,6 @@
     "prettier:fix": "prettier --write 'src/**/*.ts' 'test/**/*.ts'",
     "lint": "NODE_NO_WARNINGS=1 eslint . --ext .ts --ignore-path ./.eslintignore  --max-warnings 0",
     "clean": "rm -rf ./lib"
-    
   },
   "devDependencies": {
     "@aztec/bb.js": "0.7.2",