[DevTools] Stop setting unused global variables #35532
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We no longer set the following globals since they're not read by DevTools. It also doesn't look like they had any meaningful values anymore which was hidden by missing Flow coverage.
__REACT_DEVTOOLS_APPEND_COMPONENT_STACK____REACT_DEVTOOLS_BREAK_ON_CONSOLE_ERRORS____REACT_DEVTOOLS_SHOW_INLINE_WARNINGS_AND_ERRORS____REACT_DEVTOOLS_HIDE_CONSOLE_LOGS_IN_STRICT_MODE____REACT_DEVTOOLS_DISABLE_SECOND_CONSOLE_LOG_DIMMING_IN_STRICT_MODE____REACT_DEVTOOLS_COMPONENT_FILTERS__is still set since it's still in use (although not fully functional in the browser extension which I intend to fix).