fix(validation): remove run_eval/eval_only from MultiNodeAgenticMatrixEntry

Main branch already handles these fields via Optional on
SingleNodeAgenticMatrixEntry; MultiNodeAgenticMatrixEntry doesn't
need them.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: seungrokj

utils/matrix_logic/validation.py

@@ -333,8 +333,6 @@ class MultiNodeAgenticMatrixEntry(BaseModel):
     exp_name: str = Field(alias=Fields.EXP_NAME.value)
     disagg: bool
     scenario_type: str = Field(alias=Fields.SCENARIO_TYPE.value)
-    run_eval: bool = Field(alias=Fields.RUN_EVAL.value, default=False)
-    eval_only: bool = Field(alias=Fields.EVAL_ONLY.value, default=False)
 
     @model_validator(mode='after')
     def validate_worker_hardware_pair(self):