[Sema] Remove unused isNonTypeNestedNameSpecifier

The last use was removed by:

  commit 04f131da0b19abff611773c03be9bafb53c753ce
  Author: Richard Smith <richard@metafoo.co.uk>
  Date:   Fri Jan 24 15:14:25 2020 -0800

Differential Revision: https://reviews.llvm.org/D152634

1 files changed, 0 insertions, 45 deletions

diff --git a/clang/lib/Sema/SemaCXXScopeSpec.cpp b/clang/lib/Sema/SemaCXXScopeSpec.cpp
index b11f4f1..f37ba5c 100644
--- a/clang/lib/Sema/SemaCXXScopeSpec.cpp
+++ b/clang/lib/Sema/SemaCXXScopeSpec.cpp
@@ -415,51 +415,6 @@ NamedDecl *Sema::FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS) {
   return nullptr;
 }
 
-bool Sema::isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS,
-                                        NestedNameSpecInfo &IdInfo) {
-  QualType ObjectType = GetTypeFromParser(IdInfo.ObjectType);
-  LookupResult Found(*this, IdInfo.Identifier, IdInfo.IdentifierLoc,
-                     LookupNestedNameSpecifierName);
-
-  // Determine where to perform name lookup
-  DeclContext *LookupCtx = nullptr;
-  bool isDependent = false;
-  if (!ObjectType.isNull()) {
-    // This nested-name-specifier occurs in a member access expression, e.g.,
-    // x->B::f, and we are looking into the type of the object.
-    assert(!SS.isSet() && "ObjectType and scope specifier cannot coexist");
-    LookupCtx = computeDeclContext(ObjectType);
-    isDependent = ObjectType->isDependentType();
-  } else if (SS.isSet()) {
-    // This nested-name-specifier occurs after another nested-name-specifier,
-    // so long into the context associated with the prior nested-name-specifier.
-    LookupCtx = computeDeclContext(SS, false);
-    isDependent = isDependentScopeSpecifier(SS);
-    Found.setContextRange(SS.getRange());
-  }
-
-  if (LookupCtx) {
-    // Perform "qualified" name lookup into the declaration context we
-    // computed, which is either the type of the base of a member access
-    // expression or the declaration context associated with a prior
-    // nested-name-specifier.
-
-    // The declaration context must be complete.
-    if (!LookupCtx->isDependentContext() &&
-        RequireCompleteDeclContext(SS, LookupCtx))
-      return false;
-
-    LookupQualifiedName(Found, LookupCtx);
-  } else if (isDependent) {
-    return false;
-  } else {
-    LookupName(Found, S);
-  }
-  Found.suppressDiagnostics();
-
-  return Found.getAsSingle<NamespaceDecl>();
-}
-
 namespace {
 
 // Callback to only accept typo corrections that can be a valid C++ member