Account for removal of consequent inside ternary for no-console plugin. Fixes #374

[DrewML]

Figured I'd take a whack at it. The ideal minified form of this would probably be:

// in
var foo = console.log ? console.log('lol') : someOtherFn;
// out
var foo = someOtherFn;

but I just went with what would fix the bug for now. Feedback welcome.

[boopathi]

Related:

• path.remove sometimes throws #300
• Fix remove hooks for Assignment/Conditional babel#4896

[boopathi]

• logical Expression - remove it
• [ console.log() ] - can't remove - array length changes.
• Conditional Expression - replace to void 0 and let minify-simplify change it to logical expression
• If the parent is an ExpressionStatement, then remove it.

So, if it's any other expression other than logical expression, can't we just replace it with void 0 and let other plugins which handle void 0 (https://github.com/babel/babili/tree/master/packages/babel-plugin-transform-remove-undefined) handle that ?

Edit:
Even for logical expressions we can just replace it with undefined