refactor: remove FPE mask #2284 (marked as #2348) (#3510)

marginally related to:
- #2348

closes: #2284

Note:
The removed FPEs were tagged as `#2348` but are related to `#2284`.

I noticed, that the FPE in the `RootTrackStatesWriter` also has the same code but unmasked for the pulls-calculation, but the second code only is for unbiased states, therefore seems not to fire at all.

The FPEs in the `RootTrackSummaryWriter` have the same issue tagged, but seem to be irrelevant by now, so this removes them.

If some future tests fail, it is due to some problematic behaviour that shouldn't occur in the first place. More info could be obtain by disabling the FPE-check.

I couldn't really find, why we masked this one in the git history. Maybe we can try to add some more description to the issue in the future. I will add the findings of this PR to the issue for reference.

Examples/Io/Root/src/RootTrackSummaryWriter.cpp

@@ -425,11 +425,7 @@ ProcessCode RootTrackSummaryWriter::writeT(const AlgorithmContext& ctx,
              param[Acts::eBoundTime] - t_time};
 
       for (unsigned int i = 0; i < Acts::eBoundSize; ++i) {
-        // MARK: fpeMaskBegin(FLTDIV, 1, #2348)
-        // MARK: fpeMaskBegin(FLTINV, 1, #2348)
         pull[i] = res[i] / error[i];
-        // MARK: fpeMaskEnd(FLTINV)
-        // MARK: fpeMaskEnd(FLTDIV)
       }
     }