Move isStringOrNumericLiteral closer to its only use

Author: Andy Hanson

src/compiler/factory.ts

@@ -4709,7 +4709,7 @@ namespace ts {
     /**
      * Gets the property name of a BindingOrAssignmentElement
      */
-    export function getPropertyNameOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement) {
+    export function getPropertyNameOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): PropertyName | undefined {
         switch (bindingElement.kind) {
             case SyntaxKind.BindingElement:
                 // `a` in `let { a: b } = ...`
@@ -4754,6 +4754,12 @@ namespace ts {
         Debug.fail("Invalid property name for binding element.");
     }
 
+    function isStringOrNumericLiteral(node: Node): node is StringLiteral | NumericLiteral {
+        const kind = node.kind;
+        return kind === SyntaxKind.StringLiteral
+            || kind === SyntaxKind.NumericLiteral;
+    }
+
     /**
      * Gets the elements of a BindingOrAssignmentPattern
      */

src/compiler/utilities.ts

@@ -2560,14 +2560,8 @@ namespace ts {
         return false;
     }
 
-    export function isStringOrNumericLiteral(node: Node): node is StringLiteral | NumericLiteral {
-        const kind = node.kind;
-        return kind === SyntaxKind.StringLiteral
-            || kind === SyntaxKind.NumericLiteral;
-    }
-
     export function isStringOrNumericLiteralLike(node: Node): node is StringLiteralLike | NumericLiteral {
-        return isStringOrNumericLiteral(node) || isNoSubstitutionTemplateLiteral(node);
+        return isStringLiteralLike(node) || isNumericLiteral(node);
     }
 
     /**