Remove deprecated getVisitFn function (#3580)

Author: IvanGoncharov

src/index.ts

@@ -219,7 +219,6 @@ export {
   // Visit
   visit,
   visitInParallel,
-  getVisitFn,
   getEnterLeaveForKind,
   BREAK,
   Kind,

src/language/index.ts

@@ -16,13 +16,7 @@ export type { ParseOptions } from './parser';
 
 export { print } from './printer';
 
-export {
-  visit,
-  visitInParallel,
-  getVisitFn,
-  getEnterLeaveForKind,
-  BREAK,
-} from './visitor';
+export { visit, visitInParallel, getEnterLeaveForKind, BREAK } from './visitor';
 export type { ASTVisitor, ASTVisitFn, ASTVisitorKeyMap } from './visitor';
 
 export { Location, Token, OperationTypeNode } from './ast';

src/language/visitor.ts

@@ -394,19 +394,3 @@ export function getEnterLeaveForKind(
   // { enter() {}, leave() {} }
   return { enter: (visitor as any).enter, leave: (visitor as any).leave };
 }
-
-/**
- * Given a visitor instance, if it is leaving or not, and a node kind, return
- * the function the visitor runtime should call.
- *
- * @deprecated Please use `getEnterLeaveForKind` instead. Will be removed in v17
- */
-/* c8 ignore next 8 */
-export function getVisitFn(
-  visitor: ASTVisitor,
-  kind: Kind,
-  isLeaving: boolean,
-): ASTVisitFn<ASTNode> | undefined {
-  const { enter, leave } = getEnterLeaveForKind(visitor, kind);
-  return isLeaving ? leave : enter;
-}