USE BASE_NAME
DECLARE @sc varchar(max), @sp varchar(max)

DECLARE cr CURSOR FOR
SELECT
ROUTINE_SCHEMA,
SPECIFIC_NAME 
FROM INFORMATION_SCHEMA.ROUTINES 
WHERE ROUTINE_TYPE = 'PROCEDURE'
OPEN cr
FETCH NEXT FROM cr INTO @sc, @sp
WHILE @@FETCH_STATUS = 0 BEGIN
	EXECUTE('DROP PROCEDURE ' + @sc + '.' + @sp)
	FETCH NEXT FROM cr INTO @sc, @sp
END
CLOSE cr
DEALLOCATE cr