chore: remove redundant if statement

[cuiweixie]

these two statements is duplicated.

graph-node/chain/ethereum/src/polling_block_stream.rs

Lines 369 to 375 in a9b3cf0

	if to > head_ptr.number - reorg_threshold {
	return Ok(ReconciliationStep::Retry);
	}
	if to > head_ptr.number - reorg_threshold {
	return Ok(ReconciliationStep::Retry);
	}

[lutter]

Nice catch! Thanks for the contribution.

Since the commit wasn't signed, I couldn't merge the PR. But I committed an identical change as 68fc7f6