Remove the auto_ptr dictionary and demote the resulting message in InitRootHandlers

The demoted message effectively tells that the dictionary for auto_ptr
is missing. If we don't consider the message as an error, ROOT will
auto-parse the necessary header. This auto-parsing was deemed to be
less bad than keeping the dictionary for auto_ptr (with the compiler
warnings etc).

Author: makortel

DataFormats/TestObjects/src/classes_def.xml

@@ -410,7 +410,6 @@ exception when running testMissingDictionaryChecking_cfg.py.
   <version ClassVersion="4" checksum="3437951039"/>
   <version ClassVersion="3" checksum="1545257825"/>
  </class>
- <class name="std::auto_ptr<edmtest::SchemaEvolutionContained>"/>
  <class name="edmtest::compat::deprecated_auto_ptr<edmtest::SchemaEvolutionContained>"/>
  <class name="edmtest::SchemaEvolutionAutoPtrToUniquePtr" ClassVersion="4">
   <version ClassVersion="4" checksum="2908944573"/>

FWCore/Services/plugins/InitRootHandlers.cc

@@ -164,7 +164,7 @@ namespace {
   }
 
   //Contents of a message which should be reported as an INFO not a ERROR
-  constexpr std::array<const char* const, 11> in_message{
+  constexpr std::array<const char* const, 12> in_message{
       {"no dictionary for class",
        "already in TClassTable",
        "matrix not positive definite",
@@ -175,7 +175,8 @@ namespace {
        "nbinsy is <=0 - set to nbinsy = 1",
        "oneapi::tbb::global_control is limiting",
        "ufirst < fXmin, fXmin is used",
-       "ulast > fXmax, fXmax is used"}};
+       "ulast > fXmax, fXmax is used",
+       "Inspection for auto_ptr"}};
 
   //Location generating messages which should be reported as an INFO not a ERROR
   constexpr std::array<const char* const, 7> in_location{{"Fit",