fix: new ruff PERF102 dict errors

Author: alexfikl

pymbolic/geometric_algebra/__init__.py

@@ -1136,7 +1136,7 @@ def xproject(
     def all_grades(self) -> set[int]:
         """Return a :class:`set` of grades occurring in *self*."""
 
-        return {bits.bit_count() for bits, _coeff in self.data.items()}
+        return {bits.bit_count() for bits in self.data}
 
     def get_pure_grade(self) -> int | None:
         """If *self* only has components of a single grade, return

pymbolic/mapper/__init__.py

@@ -701,7 +701,7 @@ def map_multivector(self,
             ) -> ResultT:
         return self.combine(
                 self.rec(coeff, *args, **kwargs)
-                for _bits, coeff in expr.data.items())
+                for coeff in expr.data.values())
 
     def map_common_subexpression(self,
                 expr: p.CommonSubexpression, /, *args: P.args, **kwargs: P.kwargs

pymbolic/mapper/dependency.py

@@ -120,7 +120,7 @@ def map_call_with_kwargs(
                 [self.rec(child, *args, **kwargs) for child in expr.parameters]
                 + [
                     self.rec(val, *args, **kwargs)
-                    for _name, val in expr.kw_parameters.items()
+                    for val in expr.kw_parameters.values()
                 ]
             )
         elif self.include_calls: