[RF] Don't support `proof` anymore in RooFit and RooStats

[guitargeek]

The PROOF interface in RooFit/RooStats didn't work anymore for a long time, so nobody will be suprised if this is removed.

[phsft-bot]

Starting build on ROOT-performance-centos8-multicore/soversion, ROOT-ubuntu2204/nortcxxmod, ROOT-ubuntu2004/python3, mac12arm/cxx20, windows10/default How to customize builds

[phsft-bot]

Build failed on windows10/default. See console output.

[github-actions[bot]]

Test Results

    18 files      18 suites   3d 23h 6m 28s ⏱️  2 664 tests  2 664 ✅ 0 💤 0 ❌ 46 234 runs  46 234 ✅ 0 💤 0 ❌

Results for commit 240b6105.

:recycle: This comment has been updated with latest results.

[dpiparo]

Great simplification, which matches well the PROOF=OFF by default in master: thanks. This is not very important, but could users rely on some other sort of parallelism, e.g. T{Thread/Process}Executor?

[ferdymercury]

Thanks! Related: maybe it's good to remove also TProof and other deprecated features from the roofit tutorials. Right now, many are failing while building the docu, see: https://lcgapp-services.cern.ch/root-jenkins/view/ROOT/job/root-makedoc-master/lastBuild/console

things like:

warning: 'createIterator' is deprecated: will be removed in ROOT v6.34: begin(), end() and range-based for loops. 
use of undeclared identifier 'TProofLite' because of inc/RooStats/ProofConfig.h:            int nMaxWorkers = gROOT->ProcessLineFast("TProofLite::GetNumberOfWorkers()");
Warning in <ROOT::Math::Fitter::CalculateHessErrors>: Error when calculating Hessian
 *** Break *** segmentation violation

[guitargeek]

Hi @ferdymercury, that's what I did in this PR. Or was there something I missed?

[phsft-bot]

Starting build on ROOT-performance-centos8-multicore/soversion, ROOT-ubuntu2204/nortcxxmod, ROOT-ubuntu2004/python3, mac12arm/cxx20, windows10/default How to customize builds

[ferdymercury]

Oh right, sorry! I think the only thing missing would be to replace the deprecated createIterator functions in two or three files under tutorials. grep -r createIterator tutorials/

[phsft-bot]

Build failed on windows10/default. Running on null:C:\build\workspace\root-pullrequests-build See console output.

Failing tests:

• projectroot.roofit.roofitcore.test.gtest_roofit_roofitcore_test_testRooFuncWrapper

[guitargeek]

Oh right, sorry! I think the only thing missing would be to replace the deprecated createIterator functions in two or three files under tutorials. grep -r createIterator tutorials/

Thanks I get it now! I have opened a PR, feel free to review if you have time: https://github.com/root-project/root/pull/15024