Remove deprecated QDQ fusion pass argument

Remove deprecated --enable_qdq_fusion_pass argument and related logging.

Author: psiddh

examples/arm/aot_arm_compiler.py

@@ -603,6 +603,11 @@ def get_args():
         action="store_false",
         help="Disable strict checking while exporting models.",
     )
+    parser.add_argument(
+        "--enable_qdq_fusion_pass",
+        action="store_true",
+        help="[DEPRECATED] This flag is no longer used and will be removed in a future release.",
+    )
     parser.add_argument(
         "--enable_debug_mode",
         required=False,
@@ -846,6 +851,13 @@ def to_edge_no_delegate(
     model = exported_program.module()
     model_fp32 = model
 
+    if args.enable_qdq_fusion_pass:
+        logging.warning(
+            "--enable_qdq_fusion_pass is deprecated and has no effect. "
+            "Quantized node replacement is now handled within the "
+            "respective compilation paths."
+    )
+
     model_name = os.path.basename(os.path.splitext(args.model_name)[0])
     if args.intermediates:
         os.makedirs(args.intermediates, exist_ok=True)