Neither coverage nor pip are needed to run tests.

--- packaging-26.0/pyproject.toml.orig
+++ packaging-26.0/pyproject.toml
@@ -37,8 +37,6 @@
 
 [dependency-groups]
 test = [
-  "coverage[toml]>=7.2.0",
-  "pip>=21.1",
   "pretend",
   "pytest>=6.2.0",
   "tomli; python_version<'3.11'",