Update 7060X6 O128 bcm configs (#23268)

Why I did it
Update Arista-7060X6-64PE-B-O128 bcm configs, remove unneeded S2 port configs

signed-off-by:jianquanye@microsoft.com

Author: dayouliu1

device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-O128/th5-a7060x6-64pe.config.bcm

@@ -1331,14 +1331,6 @@ device:
                 PORT_ID: 530
             :
                 PC_PHYS_PORT_ID: 509
-            ?
-                PORT_ID: 118
-            :
-                PC_PHYS_PORT_ID: 513
-            ?
-                PORT_ID: 254
-            :
-                PC_PHYS_PORT_ID: 514
 ...
 ---
 device:
@@ -1383,13 +1375,6 @@ device:
                 NUM_LANES: 4
                 FEC_MODE: PC_FEC_RS544_2XN
                 MAX_FRAME_SIZE: 9416
-            ?
-                PORT_ID: [118, 254]
-            :
-                ENABLE: 0
-                SPEED: 10000
-                NUM_LANES: 1
-                MAX_FRAME_SIZE: 9416
 ...
 ---
 bcm_device: