When can I remove entries in svn:mergeinfo?

I've used TortoiseSVN for several years.

Several branches were created, merged back to trunk, and then deleted.

Example of deleted branches:

https://SvnServer/svn/MyProject/branches/branch1 https://SvnServer/svn/MyProject/branches/branch2 https://SvnServer/svn/MyProject/branches/branch3

The svn:mergeinfo of t开发者_运维百科he trunk (https://SvnServer/svn/MyProject/trunk) still contains those merge tracking info for those deleted branches.

Example of svn:mergeinfo:

/branches/branch1:2106-2146

/branches/branch2:1983-2028

/branches/branch3:1698-1741

Are these info still necessary? Can I remove them from svn:mergeinfo property?

Are they a problem? I would Just leave them, we have loads and loads of them on our Trunk. You never know if you may need to see which revisions of a branch were merged into the trunk. Also, the braches can still be viewed using the Repo Browser and just picking the revision before they were deleted.