cleanup & nitpicks on some of the code

[nkolatsis]

No major changes. Just a few cleanups and nitpicks on the security-jwt guide.

Line 87
Unnecessary import removed

Line 108
Circle brackets typo removed

Line 197, 210
RequestScoped import and annotation removed - unnecessary for this stage of the guide

Line 125, 175, 241, 458, 545, 571
String concatenation typo removed

[gsmet]

Thanks!

Changes look good but they need to be applied here: https://github.com/quarkusio/quarkus/blob/main/docs/src/main/asciidoc/security-jwt.adoc as this file will be rewritten when we release.

(There's a header in the file saying this but it's easy to miss if you jumped right to the issues you noticed!)

Will close this PR but please create one against the main repo (ideally mention in the commit and PR title that you are fixing doc issues in security-jwt.adoc).

[nkolatsis]

Thanks for the feedback @gsmet

I've followed your advice and submitted a pull request on the correct repo now: quarkusio/quarkus#43207