cleanup: removed outdated section of primary package.json #2280 (#2501)

Since this issue: https://github.com/ethereum-optimism/optimism/issues/2280
was openned, there were other entries added to "nohoist", so I just
removed the "examples/*" entry.
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

package.json

@@ -15,7 +15,6 @@
       "ops/docker/js-builder"
     ],
     "nohoist": [
-      "examples/*",
       "**/typechain",
       "**/@typechain/*"
     ]