chore: remove unused lerna.json (#865)

lerna.json

@@ -1,10 +0,0 @@
-{
-  "version": "1.6.1",
-  "registry": "https://registry.npmjs.org/",
-  "publishConfig": {
-    "access": "public",
-    "directory": "dist"
-  },
-  "npmClient": "yarn",
-  "useWorkspaces": true
-}