pytest-pretty is not needed to run tests

--- dirty_equals-0.10.0/pyproject.toml.orig
+++ dirty_equals-0.10.0/pyproject.toml
@@ -53,7 +53,6 @@
     "pydantic>=2.10.6",
     "pytest>=8.3.5",
     "pytest-examples>=0.0.18",
-    "pytest-pretty>=1.2.0",
     "ruff>=0.13.1",
     "types-pytz>=2024.2.0.20241221",
 ]