[lldb][NFC] Remove ClangASTContext::GetAsDeclContext

Everything we pass to this function is already a DeclContext.

Author: Teemperor

lldb/include/lldb/Symbol/ClangASTContext.h

@@ -308,10 +308,7 @@ class ClangASTContext : public TypeSystem {
                                             class_template_specialization_decl);
 
   static clang::DeclContext *
-  GetAsDeclContext(clang::CXXMethodDecl *cxx_method_decl);
-
-  static clang::DeclContext *
-  GetAsDeclContext(clang::ObjCMethodDecl *objc_method_decl);
+  GetAsDeclContext(clang::FunctionDecl *function_decl);
 
   static bool CheckOverloadedOperatorKindParameterCount(
       bool is_method, clang::OverloadedOperatorKind op_kind,

lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp

@@ -894,8 +894,7 @@ TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc,
                     attrs.accessibility, attrs.is_artificial, is_variadic);
             type_handled = objc_method_decl != NULL;
             if (type_handled) {
-              LinkDeclContextToDIE(
-                  ClangASTContext::GetAsDeclContext(objc_method_decl), die);
+              LinkDeclContextToDIE(objc_method_decl, die);
               m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID());
             } else {
               dwarf->GetObjectFile()->GetModule()->ReportError(
@@ -1009,10 +1008,7 @@ TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc,
                             if (method_decl->getType() ==
                                 ClangUtil::GetQualType(clang_type)) {
                               add_method = false;
-                              LinkDeclContextToDIE(
-                                  ClangASTContext::GetAsDeclContext(
-                                      method_decl),
-                                  die);
+                              LinkDeclContextToDIE(method_decl, die);
                               type_handled = true;
 
                               break;
@@ -1054,9 +1050,7 @@ TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc,
                       type_handled |= attrs.is_artificial;
 
                       if (cxx_method_decl) {
-                        LinkDeclContextToDIE(
-                            ClangASTContext::GetAsDeclContext(cxx_method_decl),
-                            die);
+                        LinkDeclContextToDIE(cxx_method_decl, die);
 
                         ClangASTMetadata metadata;
                         metadata.SetUserID(die.GetID());

lldb/source/Symbol/ClangASTContext.cpp

@@ -2487,16 +2487,6 @@ ClangASTMetadata *ClangASTContext::GetMetadata(clang::ASTContext *ast,
     return nullptr;
 }
 
-clang::DeclContext *
-ClangASTContext::GetAsDeclContext(clang::CXXMethodDecl *cxx_method_decl) {
-  return llvm::dyn_cast<clang::DeclContext>(cxx_method_decl);
-}
-
-clang::DeclContext *
-ClangASTContext::GetAsDeclContext(clang::ObjCMethodDecl *objc_method_decl) {
-  return llvm::dyn_cast<clang::DeclContext>(objc_method_decl);
-}
-
 bool ClangASTContext::SetTagTypeKind(clang::QualType tag_qual_type,
                                      int kind) const {
   const clang::Type *clang_type = tag_qual_type.getTypePtr();