flow: remove $FlowFixMe[incompatible-type]

[bubucuo]

Refine condition check and remove $FlowFixMe[incompatible-type]

Summary

How did you test this change?

[react-sizebot]

Comparing: 5d87cd2...e1db1cd

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.68 kB	6.68 kB	=	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	530.50 kB	530.50 kB	=	93.66 kB	93.66 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	=	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	655.04 kB	655.04 kB	=	115.35 kB	115.35 kB
facebook-www/ReactDOM-prod.classic.js	=	675.12 kB	675.12 kB	=	118.77 kB	118.77 kB
facebook-www/ReactDOM-prod.modern.js	=	665.54 kB	665.54 kB	=	117.13 kB	117.12 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

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