Remove some unused variable management methods in CSharpResolver.

ICSharpCode.Decompiler/CSharp/Resolver/CSharpResolver.cs

@@ -235,29 +235,6 @@ CSharpResolver WithLocalVariableStack(ImmutableStack<IVariable> stack)
 			return new CSharpResolver(compilation, conversions, context, checkForOverflow, isWithinLambdaExpression, currentTypeDefinitionCache, stack, objectInitializerStack);
 		}
 
-		/// <summary>
-		/// Opens a new scope for local variables.
-		/// </summary>
-		public CSharpResolver PushBlock()
-		{
-			return WithLocalVariableStack(localVariableStack.Push(null));
-		}
-
-		/// <summary>
-		/// Closes the current scope for local variables; removing all variables in that scope.
-		/// </summary>
-		public CSharpResolver PopBlock()
-		{
-			var stack = localVariableStack;
-			IVariable removedVar;
-			do
-			{
-				removedVar = stack.Peek();
-				stack = stack.Pop();
-			} while (removedVar != null);
-			return WithLocalVariableStack(stack);
-		}
-
 		/// <summary>
 		/// Adds a new variable or lambda parameter to the current block.
 		/// </summary>
@@ -268,16 +245,6 @@ public CSharpResolver AddVariable(IVariable variable)
 			return WithLocalVariableStack(localVariableStack.Push(variable));
 		}
 
-		/// <summary>
-		/// Removes the variable that was just added.
-		/// </summary>
-		public CSharpResolver PopLastVariable()
-		{
-			if (localVariableStack.Peek() == null)
-				throw new InvalidOperationException("There is no variable within the current block.");
-			return WithLocalVariableStack(localVariableStack.Pop());
-		}
-
 		/// <summary>
 		/// Gets all currently visible local variables and lambda parameters.
 		/// Does not include method parameters.