ci: an apt list this job does not use must not fail its setup

Two cross-build jobs died in setup with

    E: Failed to fetch https://dl.google.com/linux/chrome-stable/deb/.../Packages.gz  Hash Sum mismatch
    E: Some index files failed to download.

before a single byte was compiled. The runner image carries third-party apt
lists that these jobs never install from, and `apt-get update` fails the whole
run when any one of them is transiently inconsistent -- so a red that says
nothing about the change under test.

The lists a job has no use for are removed before the update. What remains is
Ubuntu's own, which is what `qemu-user-static`, `wine` and `build-essential`
come from.

Left alone: the two container-based jobs, whose images carry no third-party
lists, and the `|| { ... }` fallback beside the wine dpkg path, which already
continues past a failed update.

Author: speak-agent

.github/workflows/cross-build-test.yml

@@ -99,6 +99,14 @@ jobs:
 
       - name: Install qemu-user-static
         run: |
+          # The runner image carries third-party apt lists (Google Chrome
+          # among them) that this job does not use, and a transient
+          # `Hash Sum mismatch` on one of them fails the whole update -- which
+          # killed two cross-build jobs in setup, before a single byte was
+          # compiled. Dropping the lists this job has no use for is what makes
+          # the step's failure mean something about this job.
+          sudo rm -f /etc/apt/sources.list.d/google-chrome.list \
+                     /etc/apt/sources.list.d/microsoft-prod.list || true
           sudo apt-get update -qq
           sudo apt-get install -y qemu-user-static
           ${{ matrix.qemu_bin }} --version | head -1
@@ -251,6 +259,14 @@ jobs:
             sudo dpkg -i ~/wine-debs/*.deb 2>/dev/null \
               || { sudo apt-get update -qq; sudo apt-get install -f -y; }
           else
+            # The runner image carries third-party apt lists (Google Chrome
+            # among them) that this job does not use, and a transient
+            # `Hash Sum mismatch` on one of them fails the whole update -- which
+            # killed two cross-build jobs in setup, before a single byte was
+            # compiled. Dropping the lists this job has no use for is what makes
+            # the step's failure mean something about this job.
+            sudo rm -f /etc/apt/sources.list.d/google-chrome.list \
+                       /etc/apt/sources.list.d/microsoft-prod.list || true
             sudo apt-get update -qq
             sudo apt-get install -y --download-only wine64 wine \
               || sudo apt-get install -y --download-only wine

.github/workflows/openkal-cross.yml

@@ -368,6 +368,14 @@ jobs:
       - name: Install the emulators the last two scripts need
         run: |
           set -euo pipefail
+          # The runner image carries third-party apt lists (Google Chrome
+          # among them) that this job does not use, and a transient
+          # `Hash Sum mismatch` on one of them fails the whole update -- which
+          # killed two cross-build jobs in setup, before a single byte was
+          # compiled. Dropping the lists this job has no use for is what makes
+          # the step's failure mean something about this job.
+          sudo rm -f /etc/apt/sources.list.d/google-chrome.list \
+                     /etc/apt/sources.list.d/microsoft-prod.list || true
           sudo apt-get update -qq && sudo apt-get install -y -qq qemu-user
           "$XLINGS_BIN" install xim:qemu-riscv -y
           XLINGS_HOME="${MCPP_HOME:-$HOME/.mcpp}/registry" \

.github/workflows/release.yml

@@ -275,6 +275,14 @@ jobs:
 
       - name: Install system deps + qemu
         run: |
+          # The runner image carries third-party apt lists (Google Chrome
+          # among them) that this job does not use, and a transient
+          # `Hash Sum mismatch` on one of them fails the whole update -- which
+          # killed two cross-build jobs in setup, before a single byte was
+          # compiled. Dropping the lists this job has no use for is what makes
+          # the step's failure mean something about this job.
+          sudo rm -f /etc/apt/sources.list.d/google-chrome.list \
+                     /etc/apt/sources.list.d/microsoft-prod.list || true
           sudo apt-get update -qq
           sudo apt-get install -y curl git build-essential qemu-user-static
           qemu-aarch64-static --version | head -1