Remove lookup-refs

[m7pr]

Part of https://github.com/insightsengineering/coredev-tasks/issues/609

From now on, we will provide development dependencies in

Remotes: repo/project@branch

format, so it's explicitly visible in the DESCRIPTION file and can be handled by pak::install, renv::install and remotes::install.

With development dependencies specified in CJ Pipelines configuration, this connection was hidden, and it was hard to install the package from the main branch (or any other branch) locally from user's machine.

[github-actions]

✅ All contributors have signed the CLA
_{Posted by the CLA Assistant Lite bot.}

[github-actions]

Code Coverage Summary

Filename               Stmts    Miss  Cover    Missing
-------------------  -------  ------  -------  ----------
R/assert_data.R           63       0  100.00%
R/covariance_plot.R       52       5  90.38%   41, 84-87
R/fit_mmrm.R              44       0  100.00%
R/formula.R               45       0  100.00%
R/g_mmrm.R               314       7  97.77%   66-71, 306
R/labels.R                23       0  100.00%
R/lsmeans.R              205       0  100.00%
R/subgroups.R            265       0  100.00%
R/tabulate_mmrm.R         83       0  100.00%
R/utils.R                  4       0  100.00%
TOTAL                   1098      12  98.91%

Diff against main

Filename      Stmts    Miss  Cover
----------  -------  ------  --------
TOTAL             0       0  +100.00%

Results for commit: b56e0bd

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

  1 files   11 suites   14s ⏱️
110 tests  81 ✅ 29 💤 0 ❌
219 runs  178 ✅ 41 💤 0 ❌

Results for commit b56e0bd.

♻️ This comment has been updated with latest results.

[github-actions]

Unit Test Performance Difference

Test Suite	$Status$	Time on main	$±Time$	$±Tests$	$±Skipped$	$±Failures$	$±Errors$
subgroups	💚	$4.94$	$-1.54$	$-2$	$+4$	$0$	$0$

Results for commit a1dfdb9

♻️ This comment has been updated with latest results.

[m7pr]

I have read the CLA Document and I hereby sign the CLA

[m7pr]

recheck

[llrs-roche]

The three packages were published on CRAN so no Remotes is needed. Nice!