Delete staticAssertNever in favor of assertTypeIsNever

Author: amcasey

src/compiler/utilities.ts

@@ -500,13 +500,11 @@ namespace ts {
             case SyntaxKind.ArrowFunction:
                 return true;
             default:
-                staticAssertNever(node);
+                assertTypeIsNever(node);
                 return false;
         }
     }
 
-    export function staticAssertNever(_: never): void {}
-
     // Gets the nearest enclosing block scope container that has the provided node
     // as a descendant, that is not the provided node.
     export function getEnclosingBlockScopeContainer(node: Node): Node {

src/services/refactors/extractMethod.ts

@@ -851,7 +851,7 @@ namespace ts.refactor.extractMethod {
                 return scope.members;
             }
             else {
-                staticAssertNever(scope);
+                assertTypeIsNever(scope);
             }
 
             return emptyArray;