Revert "Add section regarding check constraints"

This reverts commit 203fa00.

Author: mkincaid-bw

docs/contributing/code-style/sql.md

@@ -633,14 +633,6 @@ END
 - **Foreign Keys**: `FK_{TableName}_{ReferencedTable}` (e.g., FK_Device_User)
 - **Default Constraints**: `DF_{TableName}_{ColumnName}` (e.g., [DF_Organization_UseScim])
 
-:::warning Do not create `CHECK` constraints
-
-Only primary keys, foreign keys, unique constraints, and default constraints are permitted on
-tables. Do not create `CHECK` constraints -- they encode business logic in the database, which goes
-against our policy of keeping business logic in the application layer.
-
-:::
-
 #### Column definitions
 
 - **Alignment**: Column names, data types, and nullability vertically aligned using spaces