Revert "chore: prevent postinstall script running if we're a dependen…

…cy to another project"

This reverts commit 06e15d9.

script/install.sh

@@ -1,13 +1,5 @@
 #!/bin/bash
 
-# Only run this postinstall script if we're developing it.
-# (Don't run if we're importing this package as an npm dependency
-# inside a different repo)
-if ! git rev-parse --is-inside-work-tree > /dev/null 2>&1; then
-  echo "Skipping install script because this is not inside a Git work tree."
-  exit 0
-fi
-
 echo ""
 echo "*** Removing submodules"
 rm -rf lib/