Revert "In TypeName::GetFullyQualifiedType, strip SubstTemplateTypeParmType."

This reverts commit 5190ebeb2eb0ac527881ab1c91401b20f4e54b39.

It fails on roottest/root/meta/dictSelection:execAtlasTest2

lib/Utils/AST.cpp

@@ -1515,19 +1515,6 @@ namespace utils {
       return QT;
     }
 
-    // Remove the part of the type related to the type being a template
-    // parameter (we won't report it as part of the 'type name' and it is
-    // actually make the code below to be more complex (to handle those)
-    while (isa<SubstTemplateTypeParmType>(QT.getTypePtr())) {
-      // Get the qualifiers.
-      Qualifiers quals = QT.getQualifiers();
-
-      QT = dyn_cast<SubstTemplateTypeParmType>(QT.getTypePtr())->desugar();
-
-      // Add back the qualifiers.
-      QT = Ctx.getQualifiedType(QT, quals);
-    }
-
     NestedNameSpecifier* prefix = 0;
     Qualifiers prefix_qualifiers;
     if (const ElaboratedType* etype_input