helper/replacements: remove unused typedef's

helper/replacements: remove unused typedef's

The ELF typedef's 'Elf32_Sword' and 'Elf32_Hashelt' are not used
within OpenOCD. Plus, being their name in CamelCase require extra
effort to include them in the exceptions for checkpatch.

Remove the unused typedef's.

Change-Id: I18f039567edd5b24dbb41df5406c154f31022ae7
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/6178
Tested-by: jenkins
Reviewed-by: Christian Hoff <christian.hoff@advantest.com>