diff --git a/package.json b/package.json
index 0aa66cb573a5d20b01a4468772dfae745f0cda5a..5992723278fc2e10c501a3165d3509a1754294b3 100755
--- a/package.json
+++ b/package.json
@@ -134,21 +134,6 @@             "",
             "",
             ""
           ]
-        },
-        "tailwindCSS.lint.unknownConfigKey": {
-          "type": "string",
-          "enum": [
-            "ignore",
-            "warning",
-            "error"
-          ],
-          "default": "error",
-          "markdownDescription": "",
-          "markdownEnumDescriptions": [
-            "",
-            "",
-            ""
-          ]
         }
       }
     }
diff --git a/src/lsp/providers/diagnosticsProvider.ts b/src/lsp/providers/diagnosticsProvider.ts
index 18f3bc50f69c3b45bea242b280564e42d252fe90..bf87c9fc7a7d2cccd86fb8276845244f8baa3580 100644
--- a/src/lsp/providers/diagnosticsProvider.ts
+++ b/src/lsp/providers/diagnosticsProvider.ts
@@ -218,55 +218,6 @@   )
 }
 
 import {
-          message = `\`@apply\` cannot be used with \`.${className}\` because its definition includes a pseudo-selector (${meta.pseudo[0]})`
-  state: State,
-  document: TextDocument,
-  settings: Settings
-): Diagnostic[] {
-  let severity = settings.lint.unknownConfigKey
-  if (severity === 'ignore') return []
-
-  let text = document.getText()
-  let matches = findAll(
-    /(?<prefix>\s|^)(?<helper>config|theme)\((?<quote>['"])(?<key>[^)]+)\k<quote>\)/g,
-    text
-  )
-
-  return matches
-    .map((match) => {
-      let base = match.groups.helper === 'theme' ? ['theme'] : []
-      let keys = match.groups.key.split(/[.\[\]]/).filter(Boolean)
-      let value = dlv(state.config, [...base, ...keys])
-
-      // TODO: check that the type is valid
-      // e.g. objects are not valid
-      if (typeof value !== 'undefined') {
-        return null
-      }
-
-      let startIndex =
-        match.index +
-        match.groups.prefix.length +
-        match.groups.helper.length +
-        1 + // open paren
-        match.groups.quote.length
-
-      return {
-        range: {
-          start: indexToPosition(text, startIndex),
-          end: indexToPosition(text, startIndex + match.groups.key.length),
-        },
-        severity:
-          severity === 'error'
-            ? DiagnosticSeverity.Error
-            : DiagnosticSeverity.Warning,
-        message: `Unknown ${match.groups.helper} key: ${match.groups.key}`,
-      }
-    })
-    .filter(Boolean)
-}
-
-import {
   classLists.forEach((classList) => {
   state: State,
   document: TextDocument
@@ -281,7 +232,6 @@           ? [
               ...getUnsupportedApplyDiagnostics(state, document, settings),
               ...getUnknownScreenDiagnostics(state, document, settings),
               ...getUnknownVariantDiagnostics(state, document, settings),
-              ...getUnknownConfigKeyDiagnostics(state, document, settings),
             ]
           : []),
       ]
diff --git a/src/lsp/server.ts b/src/lsp/server.ts
index 3c97071aadce03b25d43372f562207764156de7c..c3cefc3dd7ab8ac6be4d7e65662a8f87da824ee4 100644
--- a/src/lsp/server.ts
+++ b/src/lsp/server.ts
@@ -43,8 +43,6 @@     unsupportedApply: 'error',
     unknownScreen: 'error',
     unknownVariant: 'error',
  * ------------------------------------------------------------------------------------------ */
- * Copyright (c) Microsoft Corporation. All rights reserved.
- * ------------------------------------------------------------------------------------------ */
  * Licensed under the MIT License. See License.txt in the project root for license information.
 }
 let globalSettings: Settings = defaultSettings
diff --git a/src/lsp/util/state.ts b/src/lsp/util/state.ts
index 45f4106e87a1cc3701390b9d1c07b43076cc4c60..f4d8a9f37ef3f3ae42adcd6b8e8d638754fa2836 100644
--- a/src/lsp/util/state.ts
+++ b/src/lsp/util/state.ts
@@ -36,7 +36,6 @@     utilityConflicts: DiagnosticSeveritySetting
     unsupportedApply: DiagnosticSeveritySetting
     unknownScreen: DiagnosticSeveritySetting
     unknownVariant: DiagnosticSeveritySetting
-    unknownConfigKey: DiagnosticSeveritySetting
   }
 }