Unused error message

src/Compilers/CSharp/Portable/CSharpResources.Designer.cs

@@ -8377,15 +8377,6 @@ internal class CSharpResources {
             }
         }
         
-        /// <summary>
-        ///   Looks up a localized string similar to Cannot return by reference a result of &apos;{0}&apos; because the argument passed to parameter &apos;{1}&apos; cannot be returned by reference.
-        /// </summary>
-        internal static string ERR_RefReturnCall {
-            get {
-                return ResourceManager.GetString("ERR_RefReturnCall", resourceCulture);
-            }
-        }
-        
         /// <summary>
         ///   Looks up a localized string similar to &apos;await&apos; cannot be used in an expression containing a call to &apos;{0}&apos; because it returns by reference.
         /// </summary>
@@ -8457,7 +8448,18 @@ internal class CSharpResources {
                 return ResourceManager.GetString("ERR_RefReturnNonreturnableLocal2", resourceCulture);
             }
         }
-        
+
+        /// <summary>
+        ///   Looks up a localized string similar to Cannot return a parameter by reference &apos;{0}&apos; because it is not a ref or out parameter.
+        /// </summary>
+        internal static string ERR_RefReturnParameter
+        {
+            get
+            {
+                return ResourceManager.GetString("ERR_RefReturnParameter", resourceCulture);
+            }
+        }
+
         /// <summary>
         ///   Looks up a localized string similar to Cannot return a member of parameter &apos;{0}&apos; by reference because it is not a ref or out parameter.
         /// </summary>

src/Compilers/CSharp/Portable/CSharpResources.resx

@@ -4838,8 +4838,8 @@ To remove the warning, you can use /reference instead (set the Embed Interop Typ
   <data name="ERR_RefReturnReadonlyStatic2" xml:space="preserve">
     <value>Fields of static readonly field '{0}' cannot be returned by writeable reference</value>
   </data>
-  <data name="ERR_RefReturnCall" xml:space="preserve">
-    <value>Cannot return by reference a result of '{0}' because the argument passed to parameter '{1}' cannot be returned by reference</value>
+  <data name="ERR_RefReturnParameter" xml:space="preserve">
+    <value>Cannot return a parameter by reference '{0}' because it is not a ref or out parameter</value>
   </data>
   <data name="ERR_RefReturnParameter2" xml:space="preserve">
     <value>Cannot return a member of parameter '{0}' by reference because it is not a ref or out parameter</value>

src/Compilers/CSharp/Portable/Errors/ErrorCode.cs

@@ -1411,8 +1411,8 @@ internal enum ErrorCode
         ERR_RefReturnReadonlyStatic = 8161,
         ERR_RefReturnReadonly2 = 8162,
         ERR_RefReturnReadonlyStatic2 = 8163,
-        //ERR_RefReturnCall = 8164,
-        //ERR_RefReturnCall2 = 8165,
+        // ERR_RefReturnCall = 8164,
+        // ERR_RefReturnCall2 = 8165,
         ERR_RefReturnParameter = 8166,
         ERR_RefReturnParameter2 = 8167,
         ERR_RefReturnLocal = 8168,