Remove types-first from flowconfig template

Summary:
Removing the experimental types-first flag from RN templates, until these are properly documented in the docs. See facebook/flow#8279 for context.

Changelog: [Internal]

Reviewed By: jbrown215

Differential Revision: D19728257

fbshipit-source-id: 8f7473b9c8383bd1eef76b5733ff3a26e2e554fc

Author: panagosg7

template/_flowconfig

@@ -48,9 +48,6 @@ suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(<VERSION>\\)? *\\(si
 suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(<VERSION>\\)? *\\(site=[a-z,_]*react_native\\(_ios\\)?_\\(oss\\|fb\\)[a-z,_]*\\)?)\\)?:? #[0-9]+
 suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
 
-experimental.well_formed_exports=true
-experimental.types_first=true
-
 [lints]
 sketchy-null-number=warn
 sketchy-null-mixed=warn