Remove .tmpl extension from Jinja templates in core

Source/core/scripts/make_style_shorthands.py

Index: Source/core/scripts/make_style_shorthands.py
diff --git a/Source/core/scripts/make_style_shorthands.py b/Source/core/scripts/make_style_shorthands.py
index db5d1880e61962098d58283f14eae65e094cc2f2..b25ba7bd322e90590092a230bfcb032e9f8ea08b 100644
--- a/Source/core/scripts/make_style_shorthands.py
+++ b/Source/core/scripts/make_style_shorthands.py
@@ -70,14 +70,14 @@ class StylePropertyShorthandWriter(in_generator.Writer):
     def _create_css_property_name_enum_value(self, property_name):
         return "CSSProperty" + property_name
 
-    @template_expander.use_jinja("StylePropertyShorthand.cpp.tmpl")
+    @template_expander.use_jinja("StylePropertyShorthand.cpp")
     def generate_style_property_shorthand_cpp(self):
         return {
             "properties": self._properties,
             "longhands_dictionary": self._longhand_dictionary,
         }
 
-    @template_expander.use_jinja("StylePropertyShorthand.h.tmpl")
+    @template_expander.use_jinja("StylePropertyShorthand.h")
     def generate_style_property_shorthand_h(self):
         return {
             "properties": self._properties,