Moving lifetime + age to where it is used

Signed-off-by: Daniel <daniel.hutzel@sap.com>

bookstore/db/hana/index.cds

@@ -1,10 +0,0 @@
-//
-//  Add Author.age and .lifetime with a DB-specific function
-//
-
-using { AdminService } from '../schema';
-
-extend projection AdminService.Authors with {
-  YEARS_BETWEEN(dateOfBirth, dateOfDeath)         as age: Integer,
-  YEAR(dateOfBirth) || ' – ' || YEAR(dateOfDeath) as lifetime : String
-}

bookstore/db/schema.cds

@@ -1,8 +0,0 @@
-using { sap.capire.bookshop } from '@capire/bookshop';
-
-// Forward-declare calculated fields to be filled in database-specific ways
-// TODO find a better way to have 'default' fields that still can be overwritten.
-extend bookshop.Authors with {
-	virtual age: Integer;
-	virtual lifetime: String;
-}

bookstore/db/sqlite/index.cds

@@ -1,10 +0,0 @@
-//
-//  Add Author.age and .lifetime with a DB-specific function
-//
-
-using { AdminService } from '../schema';
-
-extend projection AdminService.Authors with {
-  strftime('%Y',dateOfDeath)-strftime('%Y',dateOfBirth)              as age: Integer,
-  strftime('%Y',dateOfBirth) || ' – ' || strftime('%Y',dateOfDeath)  as lifetime : String
-}