target: remove target names already deprecated in v0.8.0

Some target name were marked as deprecated in release v0.7.0 and
v0.8.0, almost 7 years ago, and replaced with more 'actual' names.
We can reasonably expect that in these 7 years any user of OpenOCD
has already migrated to v0.8.0 or to some newer release, thus has
already updated any local/personal script to get rid of the
deprecated message.

Drop the target names already deprecated in v0.8.0.

Change-Id: I7c7491496db1b302b4eb1e9fc6090b58d4acf05a
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/6086
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

src/target/cortex_a.c

@@ -3143,7 +3143,6 @@ static const struct command_registration cortex_a_command_handlers[] = {
 
 struct target_type cortexa_target = {
 	.name = "cortex_a",
-	.deprecated_name = "cortex_a8",
 
 	.poll = cortex_a_poll,
 	.arch_state = armv7a_arch_state,

src/target/cortex_m.c

@@ -2501,7 +2501,6 @@ static const struct command_registration cortex_m_command_handlers[] = {
 
 struct target_type cortexm_target = {
 	.name = "cortex_m",
-	.deprecated_name = "cortex_m3",
 
 	.poll = cortex_m_poll,
 	.arch_state = armv7m_arch_state,

src/target/hla_target.c

@@ -640,7 +640,6 @@ static const struct command_registration adapter_command_handlers[] = {
 
 struct target_type hla_target = {
 	.name = "hla_target",
-	.deprecated_name = "stm32_stlink",
 
 	.init_target = adapter_init_target,
 	.deinit_target = cortex_m_deinit_target,