Revert "Add simple CPU offloading support" (#2252)

We'll re-add the commit to correctly ack Kaichao's authorship

python/sglang/srt/models/llama.py

@@ -43,7 +43,6 @@ from sglang.srt.layers.vocab_parallel_embedding import (
 )
 from sglang.srt.managers.schedule_batch import global_server_args_dict
 from sglang.srt.model_executor.forward_batch_info import ForwardBatch
-from sglang.srt.utils import make_layers
 
 
 class LlamaMLP(nn.Module):
@@ -256,12 +255,13 @@ class LlamaModel(nn.Module):
             config.vocab_size,
             config.hidden_size,
         )
-        self.layers = make_layers(
-            config.num_hidden_layers,
-            lambda idx, prefix: LlamaDecoderLayer(
-                config=config, quant_config=quant_config, layer_id=idx, prefix=prefix
-            ),
-            prefix="model.layers",
+        self.layers = nn.ModuleList(
+            [
+                LlamaDecoderLayer(
+                    config, i, quant_config=quant_config, prefix=f"model.layers.{i}"
+                )
+                for i in range(config.num_hidden_layers)
+            ]
         )
 
         self.norm = RMSNorm(config.hidden_size, eps=config.rms_norm_eps)