Removing jsFlow from all

It breaks switch/case statements. We need to be more deliberate about
where it shows up.

Author: amadeus

syntax/javascript.vim

@@ -230,7 +230,7 @@ syntax cluster jsFlowCluster        contains=jsFlowType,jsFlowArray,jsFlowObject
 syntax keyword jsFlowStorageClass   contained const var let
 
 syntax cluster jsExpression  contains=jsBracket,jsParen,jsObject,jsBlock,jsTernaryIf,jsTaggedTemplate,jsTemplateString,jsString,jsRegexpString,jsNumber,jsFloat,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsFutureKeys,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsFuncCall,jsUndefined,jsNan,jsPrototype,jsBuiltins,jsNoise,jsClassDefinition,jsArrowFunction,jsArrowFuncArgs,jsParensError,jsComment,jsArguments,jsThis,jsSuper,jsSpreadOperator
-syntax cluster jsAll         contains=@jsExpression,jsExportContainer,jsImportContainer,jsStorageClass,jsConditional,jsRepeat,jsReturn,jsStatement,jsException,jsAsyncKeyword,jsFlow
+syntax cluster jsAll         contains=@jsExpression,jsExportContainer,jsImportContainer,jsStorageClass,jsConditional,jsRepeat,jsReturn,jsStatement,jsException,jsAsyncKeyword
 
 " Define the default highlighting.
 " For version 5.7 and earlier: only when not done already