remove one_sided_type_guards option from flowconfigs (on by default) (#…

…45349)

Summary:
Pull Request resolved: #45349

This is on by default as of version 0.239.0:

https://github.com/facebook/flow/blob/v0.239/src/commands/config/flowConfig.ml#L268

Changelog: [Internal]

Differential Revision: D59525192

.flowconfig

@@ -64,8 +64,6 @@ module.name_mapper='^react-native/\(.*\)$' -> '<PROJECT_ROOT>/packages/react-nat
 module.name_mapper='^@react-native/dev-middleware$' -> '<PROJECT_ROOT>/packages/dev-middleware'
 module.name_mapper='^@?[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> '<PROJECT_ROOT>/packages/react-native/Libraries/Image/RelativeImageStub'
 
-one_sided_type_guards=true
-
 suppress_type=$FlowIssue
 suppress_type=$FlowFixMe
 suppress_type=$FlowFixMeProps