diff --git a/packages/typescript-estree/src/clear-caches.ts b/packages/typescript-estree/src/clear-caches.ts
index 015fd18e29c8..aea4d6cf845c 100644
--- a/packages/typescript-estree/src/clear-caches.ts
+++ b/packages/typescript-estree/src/clear-caches.ts
@@ -1,9 +1,6 @@
 import { clearWatchCaches } from './create-program/getWatchProgramsForProjects';
 import { clearProgramCache as clearProgramCacheOriginal } from './parser';
-import {
-  clearTSConfigMatchCache,
-  clearTSServerProjectService,
-} from './parseSettings/createParseSettings';
+import { clearTSConfigMatchCache } from './parseSettings/createParseSettings';
 import { clearGlobCache } from './parseSettings/resolveProjectList';
 
 /**
@@ -17,7 +14,6 @@ export function clearCaches(): void {
   clearProgramCacheOriginal();
   clearWatchCaches();
   clearTSConfigMatchCache();
-  clearTSServerProjectService();
   clearGlobCache();
 }
 
diff --git a/packages/typescript-estree/src/parseSettings/createParseSettings.ts b/packages/typescript-estree/src/parseSettings/createParseSettings.ts
index 3062a6164b32..1e6e8e64dfe1 100644
--- a/packages/typescript-estree/src/parseSettings/createParseSettings.ts
+++ b/packages/typescript-estree/src/parseSettings/createParseSettings.ts
@@ -144,10 +144,6 @@ export function clearTSConfigMatchCache(): void {
   TSCONFIG_MATCH_CACHE?.clear();
 }
 
-export function clearTSServerProjectService(): void {
-  TSSERVER_PROJECT_SERVICE = null;
-}
-
 /**
  * Ensures source code is a string.
  */