fix gemma-2-27b text generation pytest

optimum/habana/transformers/models/gemma2/modeling_gemma2.py

@@ -899,7 +899,7 @@ def forward(
         output_hidden_states: Optional[bool] = None,
         return_dict: Optional[bool] = None,
         cache_position: Optional[torch.LongTensor] = None,
-        logits_to_keep: Union[int, torch.Tensor] = 0,
+        num_logits_to_keep: int = 0,
         token_idx: Optional[torch.Tensor] = None,
         trim_logits: Optional[bool] = False,
         attn_softmax_bf16: Optional[bool] = False,
@@ -956,12 +956,7 @@ def forward(
             else:
                 hidden_states = hidden_states[:, -1, :]
 
-        slice_indices = slice(-logits_to_keep, None) if isinstance(logits_to_keep, int) else logits_to_keep
-        logits = self.lm_head(hidden_states[:, slice_indices, :])
-        if self.config.final_logit_softcapping is not None:
-            logits = logits / self.config.final_logit_softcapping
-            logits = torch.tanh(logits)
-            logits = logits * self.config.final_logit_softcapping
+        logits = self.lm_head(hidden_states[:, -num_logits_to_keep:, :])
 
         loss = None
         if labels is not None: