Revert "diffoscope/comparators/symlink.py: added a try except block to track"

Copying the comment from
659d1917:

    @Vibhu-guest also I'm reverting this one, mostly because the
    authoring information is screwed (root <root@localhost.localdomain> -
    does this mean you are doing your work as root??), and should have
    probably be gone through an MR instead of being pushed to master.

    I'm also at odds about the changes themselves.  You are catching
    that OSError in those two fairly specific positions, but it feels
    rather arbitrary.  Surely ENOSPC could happen anywhere?

    Finally, I think the user at the end should at least getting
    something that tells them what the problem is.  I think this way the
    program terminates without printing anything?

This reverts commit 659d1917.
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testing

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failed #151654
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ubuntu-devel

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Processing triggers for libgdk-pixbuf2.0-0:amd64 (2.38.1+dfsg-1) ...
Errors were encountered while processing:
linux-firmware
linux-image-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)
E: Failed to process build dependencies
ERROR: Job failed: exit code 1
failed
stable-bpo Test
               Depends: unzip but it is not going to be installed
Depends: xmlbeans but it is not going to be installed
Depends: xxd but it is not going to be installed or
vim-common but it is not going to be installed
builddeps:essentials : Depends: build-essential but it is not going to be installed

W: Encountered an unexpected section with 1 fields: Message: (UNSAT) No Solutions according to the given preferences
E: Broken packages
ERROR: Job failed: exit code 1