Cleanup .gitignore file #1144

1. 
   hebasto commented at 3:18 pm on October 28, 2022: member

   1. The #748 had some kind of a hidden merge conflict with the #806, which was merged earlier. Both PRs added the same lines into the .gitignore file:

   0*.log
   1*.trs
   

   To de-duplicate these lines, it seems the easiest way is to revert the smallest commit.

   2. The !.gitignore line was introduced in a16c3a905bbb56f667684d17b80c30e96f961620 for the obj/.gitignore file. The obj directory has been unused since 78cd96b15153e209cf4829a511f9efdfdcf7e4d0.
2. Revert "Add test logs to gitignore"

   This reverts commit bceefd6547635132ba17f022a52db18f17e00df6.

   798727ae1e
3. Cleanup `.gitignore` file

   The removed line was introduced for `obj/.gitignore` file. Since the
   `obj` directory has been removed, it is not longer required.

   f5039cb66c
4. hebasto renamed this:
   Revert "Add test logs to gitignore"
   Cleanup `.gitignore` file
   on Oct 28, 2022
5. real-or-random approved
6. 
   real-or-random commented at 3:23 pm on November 1, 2022: contributor

   ACK f5039cb66c9f49d1c78fa59c0e83d0d122292697
7. 
   jonasnick commented at 4:28 pm on November 1, 2022: contributor

   ACK f5039cb66c9f49d1c78fa59c0e83d0d122292697
8. 
   sipa commented at 4:32 pm on November 1, 2022: contributor

   ACK f5039cb66c9f49d1c78fa59c0e83d0d122292697
9. jonasnick merged this on Nov 1, 2022
10. jonasnick closed this on Nov 1, 2022

    ---

11. hebasto deleted the branch on Nov 1, 2022
12. dhruv referenced this in commit a0bb5b6946 on Nov 17, 2022
13. dhruv referenced this in commit 2e4c03dd67 on Nov 17, 2022
14. dhruv referenced this in commit 388c9b1b55 on Nov 21, 2022
15. dhruv referenced this in commit 244eb87643 on Dec 7, 2022
16. dhruv referenced this in commit 92cddabc43 on Dec 8, 2022
17. sipa referenced this in commit 9d47e7b71b on Dec 13, 2022
18. dhruv referenced this in commit 55ffd47cc6 on Dec 14, 2022
19. dhruv referenced this in commit 967c65b158 on Dec 14, 2022
20. dhruv referenced this in commit 78b5ddf28b on Jan 11, 2023
21. dhruv referenced this in commit 215394a1d5 on Jan 11, 2023
22. div72 referenced this in commit 945b094575 on Mar 14, 2023
23. str4d referenced this in commit 0df7b459f6 on Apr 21, 2023
24. vmta referenced this in commit e1120c94a1 on Jun 4, 2023
25. vmta referenced this in commit 8f03457eed on Jul 1, 2023
26. jonasnick cross-referenced this on Jul 17, 2023 from issue Upstream PRs 1056, 1104, 1105, 1084, 1114, 1115, 1116, 1120, 1122, 1121, 1128, 1131, 1144, 1150, 1146 by jonasnick

Contributors
hebasto real-or-random jonasnick sipa