ionic doctor check fails if config.xml doesn't exist

[SeijiSuenaga]

Description:
ionic doctor check fails if config.xml doesn't exist.

Steps to Reproduce:
I had an existing PWA project with a config.xml file. Since the Ionic CLI 3.17.0 changelog notes said new apps won't have config.xml if Cordova isn't used, I deleted the file. Then, I ran ionic doctor check.

Output:

[WARN] For best results, please make sure you're logged in to Ionic.

       Some issues can't be detected without authentication. Run:

            ionic login

× Detecting issues: 5 / 16 complete - failed!
Error: ENOENT: no such file or directory, open 'E:\Projects\ionic\config.xml'
    at Error (native)

My ionic info:

cli packages: (C:\Users\username\AppData\Roaming\npm\node_modules)

    @ionic/cli-utils  : 1.17.0
    ionic (Ionic CLI) : 3.17.0

global packages:

    Gulp CLI : not installed globally

local packages:

    @ionic/app-scripts : 3.1.0
    Ionic Framework    : ionic-angular 3.9.2

System:

    Node : v6.11.1
    npm  : 3.10.10
    OS   : Windows 10

Misc:

    backend : legacy

[imhoffd]

Thanks @SeijiSuenaga - I had a line out of order. I also fixed this such that when it tries to detect an issue that throws an error, it just logs the error.

[imhoffd]

If you haven't already, you can also remove resources/ if you're not using it.