CAM: Remove comment (#20931)

* Update helix.py

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/Mod/CAM/Path/Base/Generator/helix.py

@@ -126,7 +126,7 @@ def generate(
             )
         outer_radius = hole_radius
 
-    else:  # inner_radius > 0:
+    else:
         Path.Log.debug("(annulus mode / full hole)\n")
         outer_radius = hole_radius - tool_diameter / 2
         step_radius = inner_radius + tool_diameter / 2