Only run Valgrind command in ci for Ubuntu x86

Author: mcbarton

.github/workflows/main.yml

@@ -140,15 +140,10 @@ jobs:
               sudo apt update
               sudo apt install libc6-dbg
               micromamba install -c conda-forge valgrind
-              if [[ "${{ matrix.os }}" == *"arm"* ]]; then
-                SUPPRESSION_FILE="${{ github.workspace }}/etc/xeus-cpp-valgrind_arm.supp"
-              else
-                SUPPRESSION_FILE="${{ github.workspace }}/etc/xeus-cpp-valgrind_x86.supp"
-              fi
               valgrind --show-error-list=yes --track-origins=yes --error-exitcode=1 \
                 --show-leak-kinds=definite,possible \
                 --gen-suppressions=all \
-                --suppressions="${SUPPRESSION_FILE}" \
+                --suppressions="xeus-cpp-valgrind_x86.supp" \
                 test/test_xeus_cpp
           fi