[core] Unsafe toggles cannot be changed at runtime (#344)

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/344
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: MaranBr <maranbr@outlook.com>
Co-committed-by: MaranBr <maranbr@outlook.com>

src/common/settings.h

@@ -307,10 +307,7 @@ struct Values {
                                         true,
 #endif
                                         "cpuopt_unsafe_host_mmu",
-                                        Category::CpuUnsafe,
-                                        Specialization::Default,
-                                                 true,
-                                                 true};
+                                        Category::CpuUnsafe};
     SwitchableSetting<bool> cpuopt_unsafe_unfuse_fma{linkage, true, "cpuopt_unsafe_unfuse_fma",
                                                      Category::CpuUnsafe};
     SwitchableSetting<bool> cpuopt_unsafe_reduce_fp_error{