StringLiteral.textSourceNode cannot be PrivateName

undo an accidental change that made it so
StringLiteral.textSourceNode could be a private
name.

Signed-off-by: Max Heiber <[email protected]>

Author: mheiber

src/compiler/types.ts

@@ -1188,7 +1188,7 @@ namespace ts {
 
     export interface StringLiteral extends LiteralExpression {
         kind: SyntaxKind.StringLiteral;
-        /* @internal */ textSourceNode?: Identifier | PrivateName | StringLiteralLike | NumericLiteral; // Allows a StringLiteral to get its text from another node (used by transforms).
+        /* @internal */ textSourceNode?: Identifier | StringLiteralLike | NumericLiteral; // Allows a StringLiteral to get its text from another node (used by transforms).
         /** Note: this is only set when synthesizing a node, not during parsing. */
         /* @internal */ singleQuote?: boolean;
     }