revert setup.py

setup.py

diff --git a/setup.py b/setup.py
index 1543333..105cb1c 100644
--- a/setup.py
+++ b/setup.py
@@ -42,7 +42,7 @@
     # NOTE: Maintainers, please do not require google-api-core>=2.x.x
     # Until this issue is closed
     # https://github.com/googleapis/google-cloud-python/issues/10566
-    "google-api-core @ https://github.com/googleapis/python-api-core/archive/refs/tags/v2.18.0rc0.zip",
+    "google-api-core >= 1.31.5, <3.0.0.dev0,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.0",
     "uritemplate>=3.0.1,<5",
 ]