To quickly look through your stored procedure objects for a text value in a database instance, do the following:

use [Metro]
go


SELECT ROUTINE_NAME
  FROM INFORMATION_SCHEMA.ROUTINES
   WHERE ROUTINE_DEFINITION LIKE '%whatyouarelookingfor%'
     AND ROUTINE_TYPE = 'PROCEDURE' 
 

Now, this is no replacement for a configuration management repository, but it will do in a pinch. BTW, remember this sql statement does NOT transcend all databases on the server, just a single db instance.