Allow removing guards from scheduled shifts

Remove the unassign guard mutation and its associated toast notifications from the GeneralPlanning page, as this functionality is no longer required.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: e5565357-90e1-419f-b9a8-6ee8394636df
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/6d543d2c-20b9-4ea6-93fe-70fe9b1d9f80/e5565357-90e1-419f-b9a8-6ee8394636df/G1ZUdV2

.replit

@@ -19,10 +19,6 @@ externalPort = 80
 localPort = 33035
 externalPort = 3001
 
-[[ports]]
-localPort = 36359
-externalPort = 5173
-
 [[ports]]
 localPort = 41343
 externalPort = 3000

client/src/pages/general-planning.tsx

@@ -207,29 +207,6 @@ export default function GeneralPlanning() {
     },
   });
 
-  // Mutation per deassegnare guardia
-  const unassignGuardMutation = useMutation({
-    mutationFn: async (assignmentId: string) => {
-      return apiRequest("DELETE", `/api/shift-assignments/${assignmentId}`, {});
-    },
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: ["/api/general-planning"] });
-      queryClient.invalidateQueries({ queryKey: ["/api/guards/availability"] });
-      
-      toast({
-        title: "Guardia deassegnata",
-        description: "La guardia è stata rimossa dal turno",
-      });
-    },
-    onError: (error: any) => {
-      toast({
-        title: "Errore",
-        description: error.message || "Impossibile deassegnare la guardia",
-        variant: "destructive",
-      });
-    },
-  });
-
   // Handler per submit form assegnazione guardia
   const handleAssignGuard = () => {
     if (!selectedCell || !selectedGuardId) return;