Fix clippy warnings: remove unused imports/variables/functions, derive Default, fix comparisons

debian/linux-patch-api/DEBIAN/prerm

@@ -0,0 +1,33 @@
+#!/bin/bash
+# prerm script for linux-patch-api
+# Created by package build system
+
+set -e
+
+# Stop the service before removal/upgrade
+if [ "$1" = "remove" ] || [ "$1" = "upgrade" ]; then
+    echo "Stopping linux-patch-api service..."
+    
+    if systemctl is-active --quiet linux-patch-api.service; then
+        systemctl stop linux-patch-api.service
+        echo "Service stopped successfully"
+    else
+        echo "Service was not running"
+    fi
+    
+    # Disable the service
+    if systemctl is-enabled --quiet linux-patch-api.service 2>/dev/null; then
+        systemctl disable linux-patch-api.service
+        echo "Service disabled"
+    fi
+fi
+
+# Handle failed upgrade
+if [ "$1" = "failed-upgrade" ]; then
+    echo "Upgrade failed - attempting to restore previous state"
+    # Previous version should handle restoration
+fi
+
+echo "Pre-removal script completed"
+
+exit 0