Remove unused attrs dependency

dhirschfeld · web-flow · commit 37d8a01d83b2 · 2021-01-08T16:06:22.000+10:00
diff --git a/setup.py b/setup.py
@@ -54,7 +54,6 @@
 
 install_requires = [
     "trio >= 0.15.0",
-    "attrs",
     "outcome",
     "sniffio",
 ]
