remove the impossible error for subprocess

Author: Jason2866

builder/main.py

@@ -616,10 +616,7 @@ def firmware_metrics(target, source, env):
 
         if result.returncode != 0:
             print(f"Warning: esp-idf-size exited with code {result.returncode}")
-            
-    except ImportError:
-        print("Error: esp-idf-size module not found.")
-        print("Install with: pip install esp-idf-size")
+
     except FileNotFoundError:
         print("Error: Python executable not found.")
         print("Check your Python installation.")