Remove Python 2 compatible exception code

[Schamper]

Closes #929

[codecov]

Codecov Report

Attention: Patch coverage is 24.56140% with 43 lines in your changes missing coverage. Please review.

Project coverage is 77.01%. Comparing base (90cbaac) to head (603506e).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dissect/target/filesystems/xfs.py	0.00%	7 Missing ⚠️
dissect/target/filesystems/btrfs.py	0.00%	4 Missing ⚠️
dissect/target/filesystems/ffs.py	0.00%	4 Missing ⚠️
dissect/target/filesystems/jffs.py	0.00%	4 Missing ⚠️
dissect/target/filesystems/squashfs.py	0.00%	4 Missing ⚠️
dissect/target/filesystems/vmfs.py	0.00%	4 Missing ⚠️
dissect/target/filesystems/extfs.py	25.00%	3 Missing ⚠️
dissect/target/filesystems/smb.py	0.00%	3 Missing ⚠️
dissect/target/volume.py	25.00%	3 Missing ⚠️
dissect/target/filesystems/ntfs.py	50.00%	2 Missing ⚠️
... and 4 more

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #930   +/-   ##
=======================================
  Coverage   77.01%   77.01%           
=======================================
  Files         322      322           
  Lines       27566    27566           
=======================================
  Hits        21231    21231           
  Misses       6335     6335           

Flag	Coverage Δ
unittests	77.01% <24.56%> (ø)

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