Remove deprecated getVisitFn function (graphql#3580)

Author: IvanGoncharov

src/index.ts

@@ -221,7 +221,6 @@ export {
  // Visit
  visit,
  visitInParallel,
- getVisitFn,
  getEnterLeaveForKind,
  BREAK,
  Kind,

src/language/index.ts

@@ -22,13 +22,7 @@ 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

@@ -391,19 +391,3 @@ 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;
-}