Shellcheck warnings for no-longer-existent contrib scripts

% shellcheck --version
ShellCheck - shell script analysis tool
version: 0.7.1

Running make check results in a few warnings for both contrib/dist/suse/tor.sh and contrib/dist/tor.sh, namely SC2034 (unused variables) and SC2039 (POSIX incompatibilities). If shellcheck is right, then I can gladly go ahead and address these warnings in a PR.

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