FIX: Remove warn

[mariusmihaic]

Reasoning behind the pull request

• In the old version when there was a fix for FixWaitingList which was wrongfully using a previousEpochConfig for leaving nodes, there was a log.Warn in case of shard mismatch. The reason why this warn was not triggered when nodes were starting with previousConfig from epoch = 0 is because we never changed the number of shards. This warn was adapted to work with metablock start of epoch data which might not provide enough info and trigger unnecessary warnings.

Proposed changes

• Remove warn

Testing procedure

Pre-requisites

Based on the Contributing Guidelines the PR author and the reviewers must check the following requirements are met:

• was the PR targeted to the correct branch?
• if this is a larger feature that probably needs more than one PR, is there a feat branch created?
• if this is a feat branch merging, do all satellite projects have a proper tag inside go.mod?

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (feat/staking-v4@3ec82cb). Click here to learn what that means.
Patch has no changes to coverable lines.

❗ Current head 63ed5e8 differs from pull request most recent head 85acd2c. Consider uploading reports for the commit 85acd2c to get more accurate results

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Additional details and impacted files

@@                Coverage Diff                 @@
##             feat/staking-v4    #4993   +/-   ##
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  Files                      ?      681           
  Lines                      ?    87774           
  Branches                   ?        0           
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  Hits                       ?    62096           
  Misses                     ?    21074           
  Partials                   ?     4604           

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