fjerner parser fra prettier config (#3712)

Author: hallvardastark

.prettierrc

@@ -12,6 +12,5 @@
   "singleQuote": true,
   "tabWidth": 2,
   "trailingComma": "all",
-  "useTabs": false,
-  "parser": "flow"
+  "useTabs": false
 }