[RF] Unused Class rule

[dpiparo]

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Description

The title says it all:

[2914/3037] Generating G__RooStats.cxx, ../../lib/RooStats.pcm
Warning: Unused class rule: RooStats::ToyMCPayload

Reproducer

Build the roostats dictionary.

ROOT version

master

Installation method

all

Operating system

macOS, likely others

Additional context

No response