docs(README): Remove the broken TODO badge

The service behind the badge has been broken for a while now, showing
"NetworkError when attempting to fetch resource".

Signed-off-by: Sebastian Schuberth <sebastian@doubleopen.org>

README.md

@@ -8,7 +8,7 @@
 
 [![Build and Test][7]][8] [![JitPack build status][9]][10] [![Code coverage][11]][12]
 
-[![TODOs][13]][14] [![REUSE status][15]][16] [![OpenSSF Scorecard][17]][18] [![OpenSSF Best Practices][19]][20]
+[![REUSE status][13]][14] [![OpenSSF Scorecard][15]][16] [![OpenSSF Best Practices][17]][18]
 
 [1]: https://img.shields.io/badge/Join_us_on_Slack!-ort--talk-blue.svg?longCache=true&logo=slack
 [2]: http://slack.oss-review-toolkit.org
@@ -22,14 +22,12 @@
 [10]: https://jitpack.io/#oss-review-toolkit/ort
 [11]: https://codecov.io/gh/oss-review-toolkit/ort/branch/main/graph/badge.svg?token=QD2tCSUTVN
 [12]: https://app.codecov.io/gh/oss-review-toolkit/ort
-[13]: https://badgen.net/https/api.tickgit.com/badgen/github.com/oss-review-toolkit/ort
-[14]: https://www.tickgit.com/browse?repo=github.com/oss-review-toolkit/ort
-[15]: https://api.reuse.software/badge/github.com/oss-review-toolkit/ort
-[16]: https://api.reuse.software/info/github.com/oss-review-toolkit/ort
-[17]: https://api.scorecard.dev/projects/github.com/oss-review-toolkit/ort/badge
-[18]: https://scorecard.dev/viewer/?uri=github.com/oss-review-toolkit/ort
-[19]: https://www.bestpractices.dev/projects/4618/badge
-[20]: https://www.bestpractices.dev/projects/4618
+[13]: https://api.reuse.software/badge/github.com/oss-review-toolkit/ort
+[14]: https://api.reuse.software/info/github.com/oss-review-toolkit/ort
+[15]: https://api.scorecard.dev/projects/github.com/oss-review-toolkit/ort/badge
+[16]: https://scorecard.dev/viewer/?uri=github.com/oss-review-toolkit/ort
+[17]: https://www.bestpractices.dev/projects/4618/badge
+[18]: https://www.bestpractices.dev/projects/4618
 
 # Introduction