Remove font-family.math as it is already in another feature

Author: Elchi3

features/mathml.yml

@@ -13,7 +13,6 @@ compat_features:
   - api.MathMLElement.style
   - api.MathMLElement.tabIndex
   - css.properties.display.math
-  - css.properties.font-family.math
   - css.properties.font-size.math
   - css.properties.math-depth
   - css.properties.math-shift

features/mathml.yml.dist

@@ -360,7 +360,6 @@ compat_features:
   #   chrome_android: "109"
   #   edge: "109"
   - css.properties.display.math
-  - css.properties.font-family.math
   - css.properties.math-shift
 
   # baseline: false