Is there any easy way to remove configurations(VIP, POOL, Pool member, Irule,ssl profile) in LTM?

Do you have anything specific in mind? To merely delete objects with a minimal waste of time, I recommend you use TMSH.

 Delete LTM Virtual Server
 tmsh delete ltm virtual VirtualServerName
 Delete LTM Pool
 tmsh delete ltm pool PoolName
 Remove a particular member from pool
 tmsh modify ltm pool PoolName members delete { 1.1.1.1:80 }
 Delete LTM iRule
 tmsh delete ltm rule iRuleName
 Delete SSL profile (clientside). Older TMOS versions take in keyword clientssl as written together.
  tmsh delete ltm profile client-ssl ProfileName

For a more complex task, i.e. removing Pool Member 1.1.1.1:80 from dozens of different LTM pools, I would make my changes with a search & replace function directly in the config backup file (/config/bigip.conf), and later load in the changes with

tmsh load sys config

Do you have anything specific in mind? To merely delete objects with a minimal waste of time, I recommend you use TMSH.

 Delete LTM Virtual Server
 tmsh delete ltm virtual VirtualServerName
 Delete LTM Pool
 tmsh delete ltm pool PoolName
 Remove a particular member from pool
 tmsh modify ltm pool PoolName members delete { 1.1.1.1:80 }
 Delete LTM iRule
 tmsh delete ltm rule iRuleName
 Delete SSL profile (clientside). Older TMOS versions take in keyword clientssl as written together.
  tmsh delete ltm profile client-ssl ProfileName

For a more complex task, i.e. removing Pool Member 1.1.1.1:80 from dozens of different LTM pools, I would make my changes with a search & replace function directly in the config backup file (/config/bigip.conf), and later load in the changes with

tmsh load sys config

tmsh run cm config-sync to-group device-group-failover-

tmsh run cm config-sync to-group device-group-failover-

sol14856: Performing a ConfigSync using the tmsh utility

A note on deleting VS/related configuration objects.

If one uses iApps to create virtual servers (Application Services), it is easy just to delete the iApp application service instance and get rid of related configuration objects, too.

Although the use of iApps will create a number of configuration objects (even for simple http server), managing those in a large configuration is easier and simpler than creating and managing similar services manually.

Typically an iApp creates virtual server and related objects (pools, etc) into its own folder as new object instances, which are not referenced elsewhere. Related objects are thus gathered into same place.

When manually configuring, one easily tends to reuse/reference same configuration objects (like monitors, profiles) in multiple separate and non-related virtual servers, as it is easier than creating new instances .. and eventually this may become a headache on configuration management point of view. For example a change in commonly used profile affects multiple virtual servers and may have unwanted side effects on those. Removing an object may become difficult as it is not clear where it is used..

Can you show me the easiest way to remove subnets form a NAT pools