Remove stored abbreviation

- Alpaca is fuck

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

support/clickhouse/docker-entrypoint-initdb.d/0000_init.sql

@@ -1,6 +1,5 @@
 CREATE TABLE IF NOT EXISTS qrust.assets (
     symbol LowCardinality(String),
-    abbreviation LowCardinality(String),
     class Enum('us_equity' = 1, 'crypto' = 2),
     exchange Enum(
         'AMEX' = 1,
@@ -13,7 +12,6 @@ CREATE TABLE IF NOT EXISTS qrust.assets (
         'CRYPTO' = 8
     ),
     time_added DateTime DEFAULT now(),
-    CONSTRAINT abbreviation ASSUME replace(symbol, '/', '') = abbreviation
 )
 ENGINE = ReplacingMergeTree()
 PRIMARY KEY symbol;