Typeahead: Remove unused code

[AlBlanc]

When i am using ng2-bootstrap with angular2 rc5 and typescript 2.0, i am facing this issue which happens because query is of type string so the condition typeof query === 'object' will never be fulfilled.

ERROR in [default] /web-app/node_modules/ng2-bootstrap/components/typeahead/typeahead-container.component.ts:149:34 Property 'length' does not exist on type 'never'.

[codecov-io]

Current coverage is 86.05% (diff: 100%)

Merging #888 into feat-rc5 will not change coverage

@@           feat-rc5       #888   diff @@
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  Lines           760        760          
  Methods         142        142          
  Messages          0          0          
  Branches        110        110          
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  Hits            654        654          
  Misses          106        106          
  Partials          0          0          

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[Martin-Luft]

This is not true. Please look at typeahead.directive.ts:

this.container.query = this.typeaheadSingleWords
  ? TypeaheadUtils.tokenize(normalizedQuery, this.typeaheadWordDelimiters, this.typeaheadPhraseDelimiters)
  : normalizedQuery;
...
this.container.query = this.typeaheadSingleWords
  ? TypeaheadUtils.tokenize(normalizedQuery, this.typeaheadWordDelimiters, this.typeaheadPhraseDelimiters)
  : normalizedQuery;

And TypeaheadUtils.tokenize() returns Array<string>.

So the correct solution would be to change the type from query:string to query: string | string[] (TypeScript 2) or to query: any (TypeScript 1.8).