Remove duplicate release checklist

Removing this one, and keeping https://github.com/ipfs/go-ipfs/blob/master/docs/releases.md (per @larsgeirth in https://github.com/ipfs/blog/issues/97)

Please review/modify thoroughly, I am not familiar enough with go-ipfs release process to comment on contents.

misc/release-checklist.md

-# ipfs {{version}} checklist
-
-## pre-release
-
-- [ ] CHANGELOG.md updated - PR: 
-- [ ] tests are green
-  - [ ] go-ipfs tests
-  - [ ] sharness tests
-  - [ ] webui works
-  - [ ] js-ipfs-api tests
-  - [ ] deploy on one of our hosts
-
-## RC cycle
-- [ ] versions changed to {{version}}-rcX:
-  - [ ] in repo/config/version.go
-  - [ ] in package.json
-- [ ] release {{version}}-rcX on dist
-
-## release
-- [ ] versions changed to {{version}}:
-  - [ ] in repo/config/version.go
-  - [ ] in package.json
-- [ ] gx publish done and commited
-- [ ] signed version tag pushed
-- [ ] fast forward merge of **master** to **release**
-- [ ] push release to dist
-
-## post-release
-- [ ] bump version to {{version+1}}-dev:
-  - [ ] in repo/config/version.go 
-  - [ ] in package.json
-