itests: remove cid equality comparison

[nonsense]

Fixes flaky test introduced in #7276

In-memory repo is using the MapDatastore, which doesn't return sorted CIDs list for imported files into Filecoin, hence we got a flaky test for the second comparison for the second deal.

I am removing the CID comparison here altogether, as this is somewhat independent from what this test is testing.

[codecov]

Codecov Report

Merging #7292 (567d054) into master (0216697) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #7292   +/-   ##
=======================================
  Coverage   39.13%   39.13%           
=======================================
  Files         614      614           
  Lines       64965    64965           
=======================================
+ Hits        25422    25426    +4     
+ Misses      35135    35133    -2     
+ Partials     4408     4406    -2     

Impacted Files	Coverage Δ
chain/actors/builtin/paych/paych.go	16.88% <0.00%> (-5.20%)	⬇️
chain/exchange/peer_tracker.go	66.66% <0.00%> (-4.31%)	⬇️
extern/sector-storage/manager_calltracker.go	59.03% <0.00%> (-3.53%)	⬇️
miner/miner.go	52.31% <0.00%> (-3.32%)	⬇️
extern/sector-storage/sched_worker.go	77.97% <0.00%> (-0.73%)	⬇️
chain/store/store.go	63.66% <0.00%> (-0.71%)	⬇️
chain/sync.go	64.94% <0.00%> (-0.34%)	⬇️
storage/wdpost_changehandler.go	98.11% <0.00%> (ø)
extern/sector-storage/stores/local.go	58.80% <0.00%> (ø)
chain/messagepool/messagepool.go	57.12% <0.00%> (+0.24%)	⬆️
... and 8 more

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