[Core] Remove legacy input mapper/processor from V0 (#15686)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

vllm/worker/xpu_model_runner.py

@@ -188,20 +188,11 @@ class ModelInputForXPUBuilder(ModelRunnerInputBuilderBase[ModelInputForXPU]):
             input_positions.extend(list(positions_range))
 
             if seq_group_metadata.multi_modal_data:
-                # NOTE: mm_data only includes the subset of multi-modal items
+                # NOTE: mm_kwargs only includes the subset of multi-modal items
                 # that intersect with the current prefill positions.
-                mm_data, placeholder_maps = MultiModalPlaceholderMap \
+                mm_kwargs, placeholder_maps = MultiModalPlaceholderMap \
                     .from_seq_group(seq_group_metadata, positions_range)
 
-                if self.runner.mm_registry.has_processor(
-                        self.runner.model_config):
-                    mm_kwargs = mm_data
-                else:
-                    mm_kwargs = self.runner.multi_modal_input_mapper(
-                        mm_data,
-                        seq_group_metadata.mm_processor_kwargs,
-                    )
-
                 multi_modal_kwargs_list.append(mm_kwargs)
 
                 for modality, placeholder_map in placeholder_maps.items():
@@ -404,9 +395,6 @@ class XPUModelRunner(ModelRunnerBase[ModelInputForXPUWithSamplingMetadata]):
         # Multi-modal data support
         self.input_registry = input_registry
         self.mm_registry = mm_registry
-        self.multi_modal_input_mapper = mm_registry \
-            .create_input_mapper(model_config)
-        self.mm_registry.init_mm_limits_per_prompt(self.model_config)
 
         # Lazy initialization.
         self.model: nn.Module  # Set after init_Model