message: chore(ci): remove newly appeared python 3.9
diff: @@ -47,8 +47,10 @@ rm /lib64/libvips-cpp.so.42
  rm /lib64/libvips.so.42
  # Remove default Python. It does not have SQLite module enabled required for `conan`.
  -rm -rf /usr/local/bin/python3.6
  -rm -rf /usr/local/lib/python3.6
  +rm -rf /usr/local/bin/python3.6 /usr/local/lib/python3.6
  +rm -rf /usr/local/lib/python3.9 /usr/local/include/python3.9 /usr/local/bin/python3.9
  +
  +rm -rf /usr/local/bin/python3
  # Add "UIS" repos, with more up-to-date packages (https://ius.io/)
  # Python 3.6 from IUS has SQLite enabled.
  @@ -80,6 +82,8 @@ find / -iname "python3" 2>/dev/null || true
  find / -iname "python3.6" 2>/dev/null || true
  find / -iname "python3.9" 2>/dev/null || true
  +
  +
  which "python" || true
  which "python3" || true
  which "python3.6" || true
  