Revert "Trigger the initialization of ClassDefGenerateInitInstanceLocalInjector::fgGenericInfo."

This reverts commit 7c9429e907cfaa329472dbcddddfb5d2324a2f7b.

Due to the fact that a compile ClassDefInline does not
(can not) register a header file, we have a 'new state' where
the TClass might have an initilization routine but can not
have its ClassInfo loaded.  This new state is not yet supported
by the TClass implementation, so we do not yet register the
class with a ClassDefInline in the list of class table
to avoid 'automatic' tool from attempting to use them.

core/base/inc/Rtypes.h

@@ -245,11 +245,7 @@ class ClassDefGenerateInitInstanceLocalInjector:
          SetInstance(R__instance, &New, &NewArray, &Delete, &DeleteArray, &Destruct);
          return &R__instance;
       }
-      // We need a reference to the template instance static member in a concrete function in order
-      // to force its instantiation (even before the function is actually run)
-      // Since we do have a reference to Dictionary (in T::Dictionary), using fgGenericInfo
-      // here will insure that it is initialized at process start or library load time.
-      static TClass *Dictionary() { fgIsA = fgGenericInfo->GetClass(); return fgIsA; }
+      static TClass *Dictionary() { fgIsA = GenerateInitInstanceLocal()->GetClass(); return fgIsA; }
       static TClass *Class() { SetfgIsA(fgIsA, &Dictionary); return fgIsA; }
       static const char* Name() {
          if (fgName.empty())

core/meta/test/testHashRecursiveRemove.cxx

@@ -173,14 +173,26 @@ TEST(HashRecursiveRemove,GetClassClassDefInline)
    getcl = TClass::GetClass("WrongSetup");
    EXPECT_EQ(getcl,isacl);
 
-   EXPECT_NE(nullptr,TClassTable::GetDict("InlineCompiledOnly"));
+#if 0
+   // Due to the fact that a compile ClassDefInline does not
+   // (can not) register a header file, we have a 'new state' where
+   // the TClass might have an initilization routine but can not
+   // have its ClassInfo loaded.  This new state is not yet supported
+   // by the TClass implementation, so we do not yet register the
+   // class with a ClassDefInline in the list of class table
+   // to avoid 'automatic' tool from attempting to use them.
+   //EXPECT_NE(nullptr,TClassTable::GetDict("InlineCompiledOnly"));
+   //getcl = TClass::GetClass("InlineCompiledOnly");
+   //EXPECT_NE(nullptr,getcl);
+#else
+   EXPECT_EQ(nullptr,TClassTable::GetDict("InlineCompiledOnly"));
    getcl = TClass::GetClass("InlineCompiledOnly");
-   EXPECT_NE(nullptr,getcl);
-   // EXPECT_NE(nullptr,TClass::GetClass("InlineCompiledOnly"));
+   EXPECT_EQ(nullptr,getcl);
+#endif
    InlineCompiledOnly ico;
    isacl = ico.IsA();
    EXPECT_NE(nullptr,isacl);
-   EXPECT_EQ(getcl,isacl);
+   //EXPECT_EQ(getcl,isacl);
    getcl = TClass::GetClass("InlineCompiledOnly");
    EXPECT_EQ(getcl,isacl);
 }