Removed minor optimisation which could be the cause of bugs in case same vulnerability affects different packages

Signed-off-by: Shivam Sandbhor <shivam.sandbhor@gmail.com>

Author: sbs2001

vulnerabilities/import_runner.py

@@ -212,7 +212,6 @@ def _bulk_insert_impacted_and_resolved_packages(
 
     for advisory in batch:
         vuln = _advisory_to_vulnerability(advisory, vulnerabilities)
-        vulnerabilities.remove(vuln)  # minor optimization
 
         for impacted_purl in advisory.impacted_package_urls:
             # TODO Figure out when/how it happens that a package is missing from the dict and fix it