Fix duplicated keys

Signed-off-by: Guyue Huang <[email protected]>

launcher_scripts/conf/training/nemotron/nemotron_340b.yaml

@@ -164,7 +164,6 @@ model:
   fp8_amax_history_len: 1024 # Number of steps for which amax history is recorded per tensor
   fp8_amax_compute_algo: max # 'most_recent' or 'max'. Algorithm for computing amax from history
   fp8_wgrad: True
-  ub_tp_comm_overlap: True
 
   optim:
     name: mcore_distributed_optim