Remove no-duplicates

[lencioni]

This rule appears to be part of ESLint as of 2.5.0. http://eslint.org/docs/rules/no-duplicate-imports

[benmosher]

Ah, cool, makes sense.

I can't remember if this is in one of the canned configs, but probably ought to replace it with the ESLint rule upon removal.

[benmosher]

Oh, actually, I think I will keep it. The version of this rule in this plugin resolves the path, so if you use more than one way to get to the same module, it will still be flagged. So it's a bit more powerful than the core version.

It also disambiguates Flow types vs. "normal" imports. Which seems to be desired:

• False positive no-duplicate-imports for flow types eslint/eslint#6214 (ESLint rejected this, explicitly)
• no-duplicate-imports rule for Flow type imports babel/eslint-plugin-babel#59
• Fix no-duplicate-imports for import + import type gajus/eslint-plugin-flowtype#25

Need to make note of both of these distinguishing features.