Revert "Correct DefaultParameterValueAttribute in diagnostic"

This reverts commit a8cbbce.

Author: cston

src/Compilers/CSharp/Portable/CSharpResources.resx

@@ -4062,7 +4062,7 @@ You should consider suppressing the warning only if you're sure that you don't w
     <value>Named argument '{0}' is used out-of-position but is followed by an unnamed argument</value>
   </data>
   <data name="ERR_DefaultValueUsedWithAttributes" xml:space="preserve">
-    <value>Cannot specify default parameter value in conjunction with DefaultParameterValueAttribute or OptionalAttribute</value>
+    <value>Cannot specify default parameter value in conjunction with DefaultParameterAttribute or OptionalAttribute</value>
   </data>
   <data name="ERR_DefaultValueMustBeConstant" xml:space="preserve">
     <value>Default parameter value for '{0}' must be a compile-time constant</value>

src/Compilers/CSharp/Portable/Symbols/Source/SourceComplexParameterSymbol.cs

@@ -756,7 +756,7 @@ protected override void DecodeWellKnownAttributeImpl(ref DecodeWellKnownAttribut
 
                 if (HasDefaultArgumentSyntax)
                 {
-                    // error CS1745: Cannot specify default parameter value in conjunction with DefaultParameterValueAttribute or OptionalAttribute
+                    // error CS1745: Cannot specify default parameter value in conjunction with DefaultParameterAttribute or OptionalAttribute
                     diagnostics.Add(ErrorCode.ERR_DefaultValueUsedWithAttributes, arguments.AttributeSyntaxOpt.Name.Location);
                 }
             }
@@ -952,7 +952,7 @@ private ConstantValue DecodeDefaultParameterValueAttribute(CSharpAttributeData a
 
             if (HasDefaultArgumentSyntax)
             {
-                // error CS1745: Cannot specify default parameter value in conjunction with DefaultParameterValueAttribute or OptionalAttribute
+                // error CS1745: Cannot specify default parameter value in conjunction with DefaultParameterAttribute or OptionalAttribute
                 if (diagnose)
                 {
                     diagnosticsOpt.Add(ErrorCode.ERR_DefaultValueUsedWithAttributes, node.Name.Location);