Remove redundant code.

ICSharpCode.Decompiler/IL/Transforms/NullPropagationTransform.cs

@@ -323,6 +323,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 			ILInstruction replacement;
 			switch (mode) {
 				case Mode.ReferenceType:
+				case Mode.UnconstrainedType:
 					// Wrap varLoad in nullable.unwrap:
 					replacement = new NullableUnwrap(varLoad.ResultType, varLoad, refInput: varLoad.ResultType == StackType.Ref);
 					break;
@@ -340,10 +341,6 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 						refInput: true
 					).WithILRange(varLoad);
 					break;
-				case Mode.UnconstrainedType:
-					// Wrap varLoad in nullable.unwrap:
-					replacement = new NullableUnwrap(varLoad.ResultType, varLoad, refInput: varLoad.ResultType == StackType.Ref);
-					break;
 				default:
 					throw new ArgumentOutOfRangeException(nameof(mode));
 			}
@@ -490,11 +487,6 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 			}
 			return true;
 		}
-
-		private bool MatchDefaultValueOrLdNull(ILInstruction inst)
-		{
-			return inst.MatchLdNull() || inst.MatchDefaultValue(out _);
-		}
 	}
 
 	class NullPropagationStatementTransform : IStatementTransform