Revert "Pin version of setuptools"

This reverts commit 3b782d304ec2073a6406c37b9e1a76c8aecfc9a3.

The blockers for setuptools 8 compatibility should all be resolved
now.

Change-Id: I6d2d63746f98f0f885816395f36022a2706fb9c5
diff --git a/tools/install_pip.sh b/tools/install_pip.sh
index c9119ae..55ef93e 100755
--- a/tools/install_pip.sh
+++ b/tools/install_pip.sh
@@ -83,6 +83,6 @@
     configure_pypi_alternative_url
 fi
 
-pip_install -U "setuptools<8.0"
+pip_install -U setuptools
 
 get_versions