Follow changes in the default runtime files

These removed syntaxes are included in [runtime files update][1].

[1]: https://github.com/vim/vim/commit/06fe74aef72606ac34c9f494186e52614b8fb59a#diff-613ff34c5d60e41a3fc93fcb58277143

after/syntax/css/grid-1.vim

@@ -1,5 +1,3 @@
-syn match cssFontProp contained "\<grid-template\>"
 syn keyword cssFontAttr contained dense span
 syn match cssFontAttr contained "\<auto-flow\>"
-syn match cssValueNumber contained "[01]\(.\d\+\)\=fr"
 syn region cssFunction contained matchgroup=cssFunctionName start="\<\(minmax\|repeat\)\s*(" end=")" oneline keepend