Remove update block latency procedure call

[nullpointer0x00]

Description

This PR removes the block_latency calculation logic from both the Kotlin code and the PostgreSQL stored procedure. The reason for this removal is that calculating latencies for large ranges of blocks would cause the process to run for hours without completing, which halted block collection.

Key Changes:

1. Removed block_latency calculation: The stored procedure update_block_latency() and all references to block_latency in the Kotlin code have been removed.
2. Code cleanup: Simplified queries and removed unnecessary logic that dealt with block_latency.

By removing this, we avoid performance issues that were affecting block collection, especially when handling large datasets.

closes: #XXXX

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