chore: Update .prettierrc (facebook#9860)

MichaelDeBoey · web-flow · commit c06f16c14cd5 · 2020-10-26T11:18:22.000-07:00
diff --git a/.prettierrc b/.prettierrc
@@ -1,6 +1,5 @@
 {
   "arrowParens": "avoid",
-  "trailingComma": "es5",
   "singleQuote": true,
   "semi": true
 }
