timestamp unused

[Loki-Astari]

Describe the bug

On Linux GCC Compiler we get the following warning:

[ 37%] Building CXX object CMakeFiles/ArkReactor.dir/src/arkreactor/VM/State.cpp.o
/home/runner/work/Ark/Ark/src/arkreactor/VM/State.cpp: In member function ‘void Ark::State::configure()’:
/home/runner/work/Ark/Ark/src/arkreactor/VM/State.cpp:236:21: error: variable ‘timestamp’ set but not used [-Werror=unused-but-set-variable]
236 | timestamp_t timestamp = 0;
| ^~~~~~~~~

To Reproduce
Compile on Linux using GCC

Expected behavior
There is some effort put into calculating the value of timestamp (see line 246).
So it looks like it should be used.

Additional context
This should be fixed or the variable removed.

[SuperFola]

This value was used to know if we need to recompile a file or not, but we got into a problem: we also need to check the timestamps of the imported files. A second problem appeared in Windows, getting the "last write timestamp" of a file gives us something very wrong (like 36 years in the future).