[Sema] Fix warnings

This patch fixes:

  clang/lib/Sema/SemaTemplateInstantiateDecl.cpp:3937:12: error:
  unused variable 'CanonType' [-Werror,-Wunused-variable]

  clang/lib/Sema/SemaTemplate.cpp:9279:18: error: unused variable
  'TemplateKWLoc' [-Werror,-Wunused-variable]

Author: kazutakahirata

clang/lib/Sema/SemaTemplate.cpp

@@ -9276,8 +9276,6 @@ DeclResult Sema::ActOnClassTemplateSpecialization(
 
   // NOTE: KWLoc is the location of the tag keyword. This will instead
   // store the location of the outermost template keyword in the declaration.
-  SourceLocation TemplateKWLoc = TemplateParameterLists.size() > 0
-    ? TemplateParameterLists[0]->getTemplateLoc() : KWLoc;
   SourceLocation TemplateNameLoc = TemplateId.TemplateNameLoc;
   SourceLocation LAngleLoc = TemplateId.LAngleLoc;
   SourceLocation RAngleLoc = TemplateId.RAngleLoc;

clang/lib/Sema/SemaTemplateInstantiateDecl.cpp

@@ -3932,12 +3932,6 @@ TemplateDeclInstantiator::VisitClassTemplateSpecializationDecl(
   if (SubstQualifier(D, InstD))
     return nullptr;
 
-  // Build the canonical type that describes the converted template
-  // arguments of the class template explicit specialization.
-  QualType CanonType = SemaRef.Context.getTemplateSpecializationType(
-      TemplateName(InstClassTemplate), CanonicalConverted,
-      SemaRef.Context.getRecordType(InstD));
-
   InstD->setAccess(D->getAccess());
   InstD->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation);
   InstD->setSpecializationKind(D->getSpecializationKind());