style: edtlib: Remove the redundant keys() method

Remove the redundant keys method when using the
in statement on a dict to fix the Ruff SIM118
warning.

Signed-off-by: James Roy <[email protected]>

Author: rruuaanng

.ruff-excludes.toml

@@ -439,7 +439,6 @@
     "UP007",    # https://docs.astral.sh/ruff/rules/non-pep604-annotation
 ]
 "./scripts/dts/python-devicetree/src/devicetree/edtlib.py" = [
-    "SIM118",   # https://docs.astral.sh/ruff/rules/in-dict-keys
     "UP007",    # https://docs.astral.sh/ruff/rules/non-pep604-annotation
 ]
 "./scripts/dts/python-devicetree/src/devicetree/grutils.py" = [

scripts/dts/python-devicetree/src/devicetree/edtlib.py

@@ -236,7 +236,7 @@ def __init__(self, path: Optional[str], fname2path: dict[str, str],
 
         # Initialize look up tables.
         self.prop2specs: dict[str, PropertySpec] = {}
-        for prop_name in self.raw.get("properties", {}).keys():
+        for prop_name in self.raw.get("properties", {}):
             self.prop2specs[prop_name] = PropertySpec(prop_name, self)
         self.specifier2cells: dict[str, list[str]] = {}
         for key, val in self.raw.items():