feat(TypeScript): enable 'noUnusedLocals' options

[tetsuharuohzeki]

• This would be useful to clean up our codes.
• We detect unused variables at compile time.
• We can replace tslint's no-unused-variable.

[tetsuharuohzeki]

And we could be able to disable tslint's no-unused-variable rule. It might be decrease the time to run tslint

[kwonoj]

@saneyuki , please aggregate into single issue to track enabling TS 2.0 specific features. I don't think it's need to be tracked as separated issue for each options.

[kwonoj]

Long-hanging task tracking issue #1837 can be used for those purpose.

[tetsuharuohzeki]

@kwonoj Ah, okay. I'll change title and description of #1837

[tetsuharuohzeki]

Duplicated #1837

[tetsuharuohzeki]

I'll reopen as a separated tracking issue.

[tetsuharuohzeki]

If we replace tslint's no-unused-variable, the exec time of tslint will be decreased.

The result of time npm run lint_src

env: MacBook Pro (Retina, 15-inch, Mid 2014), 2.8 GHz Intel Core i7

	real	user	sys
before	6.85	6.97	0.28
after	5.26	5.16	0.29

[kwonoj]

as this issue is discussed in #2104 and concluded to not to introduce compiler level option, I believe issue can be closed.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.