fix(ember): Drop undefined config values

[mydea]

It seems to trip something up somewhere when config is undefined, so we just remove these here to avoid this. These options are serialized etc. so there may be something weird going on there...

Fixes #9168

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	84.24 KB (0%)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	31.41 KB (0%)
@sentry/browser - Webpack (gzipped)	22 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	78.77 KB (+0.1% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	28.59 KB (+0.26% 🔺)
@sentry/browser - ES6 CDN Bundle (gzipped)	21 KB (+2.03% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	254.38 KB (+0.1% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	86.66 KB (+0.28% 🔺)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	62.35 KB (+1.84% 🔺)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	31.45 KB (+0.24% 🔺)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	84.27 KB (0%)
@sentry/react - Webpack (gzipped)	22.05 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	102.23 KB (-0.02% 🔽)
@sentry/nextjs Client - Webpack (gzipped)	50.99 KB (-0.03% 🔽)