Add method `IdTable::deleteColumn`

[joka921]

This will be useful for named graph support.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.20%. Comparing base (b70df93) to head (a7667c7). Report is 3 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1505 +/- ## ========================================== - Coverage 94.21% 94.20% -0.02% ========================================== Files 348 348 Lines 25726 25730 +4 Branches 3461 3462 +1 ========================================== Hits 24238 24238 - Misses 1446 1450 +4 Partials 42 42 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud