gguf-py : remove erroneous FFN_GATE entry (ggml-org#15583)

Author: CISC

gguf-py/gguf/tensor_mapping.py

@@ -427,7 +427,6 @@ class TensorNameMap:
             "model.layers.{bid}.residual_mlp.w1",         # arctic
             "transformer.h.{bid}.mlp.c_fc_0",             # exaone
             "model.layers.{bid}.feed_forward.gate_proj",  # llama4 jamba granite-hybrid
-            "model.layers.{bid}.block_sparse_moe.gate",   # smallthinker
             "model.transformer.blocks.{bid}.ff_proj",     # llada
             "layers.{bid}.mlp.gate_proj",                 # qwen3-embedding
         ),