fix: remove duplicate package indexes

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

Author: keshav-space

vulnerabilities/models.py

@@ -3930,7 +3930,6 @@ class Meta:
         unique_together = ("impacted_package", "package")
         indexes = [
             models.Index(fields=["package", "impacted_package"]),
-            models.Index(fields=["impacted_package", "package"]),
         ]
 
 
@@ -3952,7 +3951,6 @@ class Meta:
         unique_together = ("impacted_package", "package")
         indexes = [
             models.Index(fields=["package", "impacted_package"]),
-            models.Index(fields=["impacted_package", "package"]),
         ]