Remove final remnants of 'exported'

[tsteven4]

I think this is what was meant to be in #1145.

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
-0.02%	100.00%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (dfc770ac0a68a0827f89ddf8ef09c5766f16a53c) | 23087 | 16008 | 69.34% | | | Head commit (e2eb8f463a549cbc0e63f4c50d1e201992269300) | 23068 (-19) | 15989 (-19) | 69.31% (**-0.02%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#1146) | 1 | 1 | **100.00%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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[tsteven4]

In duplicate.cc, the comment "It looks odd ..." relates to the deleted sort and should also be deleted.

[tsteven4]

@robertlipe please take ownership of this PR, it's all your work that accidentally got into #1144 which I removed before merging.

[tsteven4]

@robertlipe can we kill #1145 and merge this? I resolved all my issues.

[robertlipe]

Indeed. I made a mess fo that. Sorry for hte buy work. I'll to set fire to 1144 right now.