##### What version (commit) do you encounter this issue on?

##### What type of issue is this (bug, feature, documentation, regression)?

##### What is the expected behavior?

##### What is actually happening?

##### What were you attempting to do when you encountered this error (give as much detail as possible)? 

##### How can we reproduce this issue?

##### How can we verify your issue is addressed?

##### If this is a large issue, what can be done immediately to alleviate the issue while working on a longer-term solution?

##### What is your evaluation on the importance of this issue, and why?

##### What branches / milestones do you believe this issue should target?
###### The list below is what is currently supported for backports
###### Remove branches (lines) you do not wish to target.
- [ ] Master
- [ ] liberty-12.2
- [ ] liberty-12.1
- [ ] kilo

##### DocImpact: This section is to be completed by the issue owner as part of the issue's resolution.
##### Does your change require documentation?
- [ ] Yes, and I submitted an issue to [Docs issues](https://github.com/rackerlabs/docs-rpc/issues "Docs issues")
- [ ] Yes, and I contributed a documentation patch to [docs-rpc](https://github.com/rackerlabs/docs-rpc "docs-rpc")
- [ ] No documentation required for this change

##### What version (commit) do you encounter this issue on?

##### What type of issue is this (bug, feature, documentation, regression)?

##### What is the expected behavior?

##### What is actually happening?

##### What were you attempting to do when you encountered this error (give as much detail as possible)? 

##### How can we reproduce this issue?

##### How can we verify your issue is addressed?

##### If this is a large issue, what can be done immediately to alleviate the issue while working on a longer-term solution?

##### What is your evaluation on the importance of this issue, and why?

##### What branches / milestones do you believe this issue should target?
###### The list below is what is currently supported for backports
###### Remove branches (lines) you do not wish to target.
- [ ] Master
- [ ] liberty-12.2
- [ ] kilo

##### DocImpact: This section is to be completed by the issue owner as part of the issue's resolution.
##### Does your change require documentation?
- [ ] Yes, and I submitted an issue to [Docs issues](https://github.com/rackerlabs/docs-rpc/issues "Docs issues")
- [ ] Yes, and I contributed a documentation patch to [docs-rpc](https://github.com/rackerlabs/docs-rpc "docs-rpc")
- [ ] No documentation required for this change

Remove liberty-12.1 from issue template
Remove liberty-12.1 from issue template

The branch liberty-12.1 has been removed from the project. This commit
updates ISSUE_TEMPLATE.md in line with that change so that new issues
do not reference a non-existent branch.
