Remove useless catch-and-rethrow blocks in Toolbox

Remove empty catch-and-rethrow blocks in Load() and Save() methods
that were catching exceptions only to rethrow them without adding
any value. This improves code clarity and exception propagation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CutList/Forms/Toolbox.cs

@@ -31,8 +31,6 @@ namespace CutList.Forms
         /// Loads the tool list from the file at ToolsFilePath
         /// </summary>
         public void Load()
-        {
-            try
         {
             if (!File.Exists(ToolsFilePath))
             {
@@ -46,15 +44,8 @@ namespace CutList.Forms
                 Tools = list;
             }
         }
-            catch (Exception ex)
-            {
-                throw;
-            }
-        }
 
         public void Save()
-        {
-            try
         {
             if (Tools == null)
                 return;
@@ -62,10 +53,5 @@ namespace CutList.Forms
             var json = JsonConvert.SerializeObject(Tools, Formatting.Indented);
             File.WriteAllText(ToolsFilePath, json);
         }
-            catch (Exception ex)
-            {
-                throw;
-            }
-        }
     }
 }