Remove obsolete

Author: tmat

src/Compilers/Core/Portable/CodeGen/ILBuilderEmit.cs

@@ -741,7 +741,7 @@ internal void EmitStringConstant(string? value, SyntaxNode? syntax)
 
             // If the length is greater than the specified threshold try lfsfld first and fall back to ldstr.
             // Otherwise, try emit ldstr and fall back to ldsfld if emitting EnC delta and the heap is already full.
-            bool success = (value.Length >= module.CommonCompilation.DataSectionStringLiteralThreshold)
+            bool success = (value.Length > module.CommonCompilation.DataSectionStringLiteralThreshold)
                 ? tryEmitLoadField() || tryEmitLoadString()
                 : tryEmitLoadString() || module.PreviousGeneration != null && tryEmitLoadField();
 

src/Compilers/Core/Portable/Compilation/Compilation.cs

@@ -3087,7 +3087,6 @@ public EmitDifferenceResult EmitDifference(
         /// of the current compilation is returned as an EmitBaseline for use in a
         /// subsequent Edit and Continue.
         /// </summary>
-        [Obsolete("Use overload that takes EmitDifferenceOptions")]
         public EmitDifferenceResult EmitDifference(
             EmitBaseline baseline,
             IEnumerable<SemanticEdit> edits,