style: revert variable.parameter syntax color.

Author: meocoder31099

src/theme.ts

@@ -801,7 +801,7 @@ function getTheme({ style, name }: { style: Style, name: string }): Record<strin
                     "font_weight": null
                 },
                 "variable.parameter": {
-                    "color": primer.orange[6],
+                    "color": null,
                     "background_color": null,
                     "font_style": null,
                     "font_weight": null

themes/github-classic.json

@@ -784,7 +784,7 @@
             "font_weight": null
           },
           "variable.parameter": {
-            "color": "#e36209",
+            "color": null,
             "background_color": null,
             "font_style": null,
             "font_weight": null
@@ -1585,7 +1585,7 @@
             "font_weight": null
           },
           "variable.parameter": {
-            "color": "#ffab70",
+            "color": null,
             "background_color": null,
             "font_style": null,
             "font_weight": null