fix: remove redundant owner and repo check, that adds useless entry, fixes #71

[stevenxxiu]

This useless entry https://github.com/foo/bar sometimes shows up for me, but I forgot how.

Looking at the code, it seems to have no purpose. The check here is repeated later on.

[sportshead]

This check is needed to prefill the URL for the find and replace in line 54. Removing it will break any links that don't have a full URL.

[stevenxxiu]

@sportshead Ah thanks. Do you have a test case where I can trigger this condition? I forgot how I triggered it last, but it annoys me often enough.

[sportshead]

Folder without a git repo/no remotes, put a comment like See chrishrb/gx.nvim#73 should do it