ci: drop downstream import check

to prevent it from interfering with the upstream CI.

The import check was added recently in
https://src.fedoraproject.org/rpms/scapy/c/878585466261f17c01516a653d19cf47022c2f9f?branch=rawhide
and it started failing when #4975
was merged with
```
+ /usr/bin/python3 -sP /usr/lib/rpm/redhat/import_all_modules.py \
  -f /builddir/build/BUILD/scapy-2.7.0-build/scapy-2.7.0-1.20260423030854887593.pr2.57.g5d1727ff.fc43.x86_64-pyproject-modules \
  -e scapy.arch.bpf.core -e scapy.arch.bpf.supersocket -e scapy.arch.windows \
  -e scapy.arch.windows.native -e scapy.arch.windows.structures \
  -e scapy.contrib.cansocket_python_can -e scapy.tools.generate_bluetooth \
  -e scapy.tools.generate_ethertypes -e scapy.tools.generate_manuf \
  -e scapy.tools.scapy_pyannotate -e scapy.libs.winpcapy
...
Check import: scapy.arch.windows.sspi
Traceback (most recent call last):
  File "/usr/lib/rpm/redhat/import_all_modules.py", line 106, in import_modules
    importlib.import_module(module)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
  File "/usr/lib64/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...
  File "/builddir/build/BUILD/scapy-2.7.0-build/BUILDROOT/usr/lib/python3.14/site-packages/scapy/arch/windows/__init__.py", line 18, in <module>
    import winreg
ModuleNotFoundError: No module named 'winreg'
```
Since it can't keep up with upstream PRs it can be trimmed.

Big endian builds are back to normal
(https://forge.fedoraproject.org/infra/ansible/pulls/3316) and left
intact.

Closes #4979

Author: evverx

.packit.yml

@@ -19,6 +19,7 @@ actions:
     - "rm -fv .packit_rpm/sources"
     # Drop all downstream patches to prevent them from interfering with upstream builds
     - "sed -ri '/^Patch[0-9]+\\:.+\\.patch/d' .packit_rpm/scapy.spec"
+    - "sed -i '/^%pyproject_check_import/d' .packit_rpm/scapy.spec"
     - "sed -i '/^%check$/apip3 install scapy-rpc\\nOPENSSL_ENABLE_SHA1_SIGNATURES=1 OPENSSL_CONF=$(python3 ./.config/ci/openssl.py) ./test/run_tests -c test/configs/linux.utsc -K ci_only -K netaccess -K scanner' .packit_rpm/scapy.spec"
     - "sed -i '/^BuildArch/aBuildRequires: can-utils' .packit_rpm/scapy.spec"
     - "sed -i '/^BuildArch/aBuildRequires: libpcap' .packit_rpm/scapy.spec"