fix: remove unneeded autocomplete_lexicon from project (#667)

[keerthanakh89]

Fixes #667

Changes Made

• Removed the if specific_tables and "autocomplete_lexicon" in specific_tables block
• Removed the entire autocomplete_lexicon SQL query block
• Removed continue # handled separately check
• Removed the condition checking for autocomplete_lexicon subset
• Cleaned up emoji_keywords handling
• All 12 references to autocomplete_lexicon have been removed

The code now processes only actual JSON tables without
generating the derived autocomplete_lexicon table.

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