Revert "tdf#125609c10 vcl/button: enforce only one radio selected on init"

This reverts commit d35171456bc230efdaa9426da1398b2db7fa0df8,
in order to resolve tdf#132581.

Only applying this to LO 6.4 which is nearing stable.
An attempt to find the real problem will be made for 7.0,
but since this reverted commit is really obsolete, it can
easily just be reverted.  (It fixes a situation caused by
a commit that has since been fully reverted. So it should
still be a valid fix, but if it exposes other problems,
it can easily just be removed to cover them up again...)

Change-Id: I0d765ce0cc4ab2b9d282d36a239518d43d6015ee
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/93522
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/vcl/source/control/button.cxx b/vcl/source/control/button.cxx
index 7d235e6..f3fedd9 100644
--- a/vcl/source/control/button.cxx
+++ b/vcl/source/control/button.cxx
@@ -1821,9 +1821,6 @@ WinBits RadioButton::ImplInitStyle( const vcl::Window* pPrevWindow, WinBits nSty
            nStyle &= ~WB_TABSTOP;
    }

    if ( IsChecked() && IsRadioCheckEnabled() )
        ImplUncheckAllOther( /*bSetStyle=*/false );

    return nStyle;
}