Revert "[Concepts] Profile TypeConstraints in ProfileTemplateParameterList"

This temporarily reverts commit 0e3ae35 because
of a potential bug.

Author: saarraz

clang/lib/AST/DeclTemplate.cpp

@@ -488,15 +488,7 @@ static void ProfileTemplateParameterList(ASTContext &C,
     if (const auto *TTP = dyn_cast<TemplateTypeParmDecl>(D)) {
       ID.AddInteger(1);
       ID.AddBoolean(TTP->isParameterPack());
-      ID.AddBoolean(TTP->hasTypeConstraint());
-      if (const TypeConstraint *TC = TTP->getTypeConstraint()) {
-        ID.AddPointer(TC->getNamedConcept()->getCanonicalDecl());
-        ID.AddBoolean(TC->hasExplicitTemplateArgs());
-        if (TC->hasExplicitTemplateArgs()) {
-          for (const auto &Arg : TC->getTemplateArgsAsWritten()->arguments())
-            Arg.getArgument().Profile(ID, C);
-        }
-      }
+      // TODO: Concepts: profile type-constraints.
       continue;
     }
     const auto *TTP = cast<TemplateTemplateParmDecl>(D);

clang/test/CXX/temp/temp.constr/temp.constr.constr/partial-specializations.cpp

@@ -31,23 +31,6 @@ namespace class_templates
   // expected-note@-2{{during template argument deduction for class template partial specialization 'B<T *>' [with T = int *]}}
   // expected-note@-3{{during template argument deduction for class template partial specialization 'B<T **>' [with T = int]}}
   // expected-note@-4 2{{in instantiation of template class 'class_templates::B<int **>' requested here}}
-
-  template<typename T, typename U = double>
-  concept same_as = is_same<T, U>::value;
-
-  template<same_as<bool> T> requires A<T>::type
-  struct B<T*> {};
-  // expected-note@-1{{previous}}
-
-  template<same_as<bool> T> requires A<T>::type
-  struct B<T*> {};
-  // expected-error@-1{{redefinition}}
-
-  template<same_as T> requires A<T>::type
-  struct B<T*> {};
-
-  template<same_as<int> T> requires A<T>::type
-  struct B<T*> {};
 }
 
 namespace variable_templates