ci: Temporarily remove riscv32 config from GHA matrix

It fails due to https://github.com/bitcoin/bitcoin/issues/35853.

It can be added back when the issue is addressed.

.github/workflows/ci.yml

@@ -535,12 +535,6 @@ jobs:
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_msan.sh'
 
-          - name: 'riscv32 bare metal, static libbitcoin_consensus'
-            warp-runner: 'warp-ubuntu-latest-x64-8x'
-            fallback-runner: 'ubuntu-latest'
-            timeout-minutes: 120
-            file-env: './ci/test/00_setup_env_riscv_bare_cross.sh'
-
     steps:
       - *ANNOTATION_PR_NUMBER