[Gardening] Remove mostly unused (but confusing) field in ResolvedCursorInfo

Author: bnbarham

include/swift/IDE/Utils.h

@@ -161,7 +161,6 @@ struct ResolvedCursorInfo {
   bool IsRef = true;
   bool IsKeywordArgument = false;
   Type Ty;
-  DeclContext *DC = nullptr;
   Type ContainerType;
   Stmt *TrailingStmt = nullptr;
   Expr *TrailingExpr = nullptr;
@@ -187,7 +186,6 @@ struct ResolvedCursorInfo {
     this->ExtTyRef = ExtTyRef;
     this->IsRef = IsRef;
     this->Ty = Ty;
-    this->DC = ValueD->getDeclContext();
     this->ContainerType = ContainerType;
   }
   void setModuleRef(ModuleEntity Mod) {

tools/swift-ide-test/swift-ide-test.cpp

@@ -3293,8 +3293,8 @@ static int doPrintTypeInterface(const CompilerInvocation &InitInvok,
   StreamPrinter Printer(llvm::outs());
   std::string Error;
   std::string TypeName;
-  if (printTypeInterface(SemaT.DC->getParentModule(), SemaT.Ty, Printer,
-                         TypeName, Error)) {
+  if (printTypeInterface(SemaT.ValueD->getDeclContext()->getParentModule(),
+                         SemaT.Ty, Printer, TypeName, Error)) {
     llvm::errs() << Error;
     return 1;
   }