CI: Drop unstable architecture test on Arm64

The RISCOF crashes intermittently and at different locations, and also
takes a long time to reproduce. So, drop the test in Arm64 CI and run
tests only locally.

Author: vacantron

.github/workflows/main.yml

@@ -267,11 +267,10 @@ jobs:
         # No 'sudo' is available
         install: |
           apt update -qq
-          apt install -yqq make git clang python3 python3-pip python3-venv libsdl2-dev libsdl2-mixer-dev lsb-release wget software-properties-common gnupg bc
+          apt install -yqq make git clang libsdl2-dev libsdl2-mixer-dev lsb-release wget software-properties-common gnupg bc
           git config --global --add safe.directory ${{ github.workspace }}
           git config --global --add safe.directory ${{ github.workspace }}/src/softfloat
           git config --global --add safe.directory ${{ github.workspace }}/src/mini-gdbstub
-          git config --global --add safe.directory ${{ github.workspace }}/tests/riscv-arch-test
           wget https://apt.llvm.org/llvm.sh
           chmod +x ./llvm.sh
           ./llvm.sh 18
@@ -281,16 +280,12 @@ jobs:
         # Append custom commands here
         run: |
           make artifact
-          make ENABLE_ARCH_TEST=1 artifact
           make -j$(nproc)
           make check -j$(nproc)
           make ENABLE_JIT=1 clean && make ENABLE_JIT=1 check -j$(nproc)
           make ENABLE_JIT=1 clean && make ENABLE_EXT_A=0 ENABLE_JIT=1 check -j$(nproc)
           make ENABLE_JIT=1 clean && make ENABLE_EXT_F=0 ENABLE_JIT=1 check -j$(nproc)
           make ENABLE_JIT=1 clean && make ENABLE_EXT_C=0 ENABLE_JIT=1 check -j$(nproc)
-          .ci/riscv-toolchain-install.sh && export PATH=$PWD/toolchain/bin:$PATH
-          python3 -m venv venv && . venv/bin/activate
-          .ci/riscv-tests.sh
 
   coding-style:
     needs: [detect-code-related-file-changes]