Fix model docstrings (#1764)

vllm/model_executor/models/gpt_bigcode.py

@@ -17,11 +17,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-"""Inference-only GPTBigCode model compatible with HuggingFace weights.
-
-The input of the model is flattened to a 1D tensor of tokens. The model uses
-InputMetadata to extract the original 2D shape of the input.
-"""
+"""Inference-only GPTBigCode model compatible with HuggingFace weights."""
 from typing import List, Optional, Tuple
 
 import torch