chore(mise): remove tool version specifications

Remove explicit version specifications for pixi, ruff, and uv
from mise configuration. These tools should be managed through
their respective installation methods rather than mise.

Author: liblaf

template/.config/mise/conf.d/10-python.toml.jinja

@@ -5,8 +5,3 @@
 
 [settings]
 jobs = 1
-
-[tools]
-pixi = "latest"
-ruff = "latest"
-uv = "latest"