diff --git a/packages/eslint-plugin/src/rules/no-unnecessary-condition.ts b/packages/eslint-plugin/src/rules/no-unnecessary-condition.ts
index 3fac4070a0cb..9a9b836bcc92 100644
--- a/packages/eslint-plugin/src/rules/no-unnecessary-condition.ts
+++ b/packages/eslint-plugin/src/rules/no-unnecessary-condition.ts
@@ -622,13 +622,9 @@ export default createRule<Options, MessageId>({
       if (prevType.isUnion()) {
         const isOwnNullable = prevType.types.some(type => {
           const signatures = type.getCallSignatures();
-          return signatures.some(sig =>
-            isNullableType(sig.getReturnType(), { allowUndefined: true }),
-          );
+          return signatures.some(sig => isNullableType(sig.getReturnType()));
         });
-        return (
-          !isOwnNullable && isNullableType(prevType, { allowUndefined: true })
-        );
+        return !isOwnNullable && isNullableType(prevType);
       }
 
       return false;
diff --git a/packages/type-utils/src/predicates.ts b/packages/type-utils/src/predicates.ts
index 26ef59355781..f5b01022237e 100644
--- a/packages/type-utils/src/predicates.ts
+++ b/packages/type-utils/src/predicates.ts
@@ -6,24 +6,10 @@ import { isTypeFlagSet } from './typeFlagUtils';
 
 const log = debug('typescript-eslint:eslint-plugin:utils:types');
 
-export interface IsNullableTypeOptions {
-  /**
-   * @deprecated - this flag no longer does anything and will be removed in the next major
-   */
-  isReceiver?: boolean;
-  /**
-   * @deprecated - this flag no longer does anything and will be removed in the next major
-   */
-  allowUndefined?: boolean;
-}
-
 /**
  * Checks if the given type is (or accepts) nullable
  */
-export function isNullableType(
-  type: ts.Type,
-  _deprecated?: IsNullableTypeOptions,
-): boolean {
+export function isNullableType(type: ts.Type): boolean {
   return isTypeFlagSet(
     type,
     ts.TypeFlags.Any |