release: remove riscv64 and powerpc64 artifacts

Their CI workflows broke for different reasons.

I perceive these as niche platforms that aren't worth blocking
a release on. And not worth my time investigating CI problems.

.github/workflows/release.yml

@@ -98,24 +98,12 @@ jobs:
           target: armv7-unknown-linux-musleabi
           strip: arm-linux-musleabi-strip
           qemu: qemu-arm
-        - build: stable-powerpc64
-          os: ubuntu-latest
-          rust: stable
-          target: powerpc64-unknown-linux-gnu
-          strip: powerpc64-linux-gnu-strip
-          qemu: qemu-ppc64
         - build: stable-s390x
           os: ubuntu-latest
           rust: stable
           target: s390x-unknown-linux-gnu
           strip: s390x-linux-gnu-strip
           qemu: qemu-s390x
-        - build: stable-riscv64
-          os: ubuntu-latest
-          rust: stable
-          target: riscv64gc-unknown-linux-gnu
-          strip: riscv64-linux-gnu-strip
-          qemu: qemu-riscv64
         - build: macos
           os: macos-latest
           rust: nightly

CHANGELOG.md

@@ -80,8 +80,6 @@ Feature enhancements:
   Improve completions for `--hyperlink-format` in bash and fish.
 * [FEATURE #3102](https://github.com/BurntSushi/ripgrep/pull/3102):
   Improve completions for `--hyperlink-format` in zsh.
-* [FEATURE #3165](https://github.com/BurntSushi/ripgrep/pull/3165):
-  Add release binaries for `riscv64gc-unknown-linux-gnu`.
 
 
 14.1.1 (2024-09-08)