Remove some suppress of -Wmaybe-uninitialized after gcc fix false positive issue

### Minimal Reproduction
```c++
#include
#include

int main() {
::std::string str;
::std::regex re(str);
return 0;
}
```
`g++ -Werror=maybe-uninitialized -O1 -fsanitize=address`
https://godbolt.org/z/jvrdhezen
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105616

### Known Defective Versions (up to 2024-10-24)
| GCC-14 | 14.1 :x: | 14.2 :x: | | |
|---------|-------------------------|-------------------------|--------------------------|-------------------------|
| GCC-13 | 13.1 :x: | 13.2 :x: | 13.3 :x: | |
| GCC-12 | 12.1 :x: | 12.2 :x: | 12.3 :x: | 12.4 :x: |
| GCC-11 | 11.1 :white_check_mark: | 11.2 :white_check_mark: | 11.3 :white_check_mark: | 11.4 :white_check_mark: |

Start by locating the project's suppressions for -Wmaybe-uninitialized, then compare them with the GCC false-positive report linked in the issue. Reproduce the warning with the provided C++ example and compiler flags; done means the obsolete suppressions are removed while the affected build still passes with the warning treated as an error.

Written by the indexing model from the issue text.