make: remove exotic build targets from release list
With this commit we remove build targets from our list of release build
OS/architecture pairs to reduce the overhead of building for them with
every pull request and every release.
According to https://tooomm.github.io/github-release-stats/?username=lightningnetwork&repository=lnd
those targets are rarely used, compared to the most popular ones:
| Release File | Absolute DL | Relative DL |
|---------------------------------------|-------------|-------------|
| lnd-darwin-amd64-v0.18.3-beta.tar.gz | 1,930 | 72 |
| lnd-darwin-arm64-v0.18.3-beta.tar.gz | 2,020 | 162 |
| lnd-freebsd-386-v0.18.3-beta.tar.gz | 1,864 | 6 |
| lnd-freebsd-amd64-v0.18.3-beta.tar.gz | 1,874 | 16 |
| lnd-freebsd-arm-v0.18.3-beta.tar.gz | 1,865 | 7 |
| lnd-linux-386-v0.18.3-beta.tar.gz | 1,873 | 15 |
| lnd-linux-amd64-v0.18.3-beta.tar.gz | 3,355 | 1,497 |
| lnd-linux-arm64-v0.18.3-beta.tar.gz | 3,053 | 1,195 |
| lnd-linux-armv6-v0.18.3-beta.tar.gz | 1,868 | 10 |
| lnd-linux-armv7-v0.18.3-beta.tar.gz | 1,893 | 35 |
| lnd-linux-mips-v0.18.3-beta.tar.gz | 1,859 | 1 |
| lnd-linux-mips64-v0.18.3-beta.tar.gz | 1,860 | 2 |
| lnd-linux-mipsle-v0.18.3-beta.tar.gz | 1,859 | 1 |
| lnd-linux-ppc64-v0.18.3-beta.tar.gz | 1,858 | 0 |
| lnd-linux-ppc64le-v0.18.3-beta.tar.gz | 1,859 | 1 |
| lnd-linux-s390x-v0.18.3-beta.tar.gz | 1,859 | 1 |
| lnd-netbsd-amd64-v0.18.3-beta.tar.gz | 1,859 | 1 |
| lnd-openbsd-amd64-v0.18.3-beta.tar.gz | 1,861 | 3 |
| lnd-source-v0.18.3-beta.tar.gz | 1,863 | 5 |
| lnd-windows-386-v0.18.3-beta.zip | 1,895 | 37 |
| lnd-windows-amd64-v0.18.3-beta.zip | 1,997 | 139 |
| lnd-windows-arm-v0.18.3-beta.zip | 1,868 | 10 |