Hi,
I scanned the site with Netpeak Spider and Screaming Frog SEO Spider. No internal links to /m and /mobile is not found.
This either means that somewhere there is an external link or that old internal links that were once on the site.
Disallow this uri in robots.txt and eventually they fall out of the search.
Another way - to do a 301 redirect to the home page.
P.S. You have problems on the site - unnecessary 301 redirect, not disallowed uri in the robots.txt, etc. I recommend to download Free Screaming Frog SEO Spider and independently verify the site. Or contact the experts.
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