diff --git a/config.xsd b/config.xsd
index 7168f7ff585..ed7a804eaad 100644
--- a/config.xsd
+++ b/config.xsd
@@ -49,18 +49,6 @@
         <xs:attribute name="ignoreInternalFunctionNullReturn" type="xs:boolean" default="true" />
         <xs:attribute name="includePhpVersionsInErrorBaseline" type="xs:boolean" default="false" />
         <xs:attribute name="inferPropertyTypesFromConstructor" type="xs:boolean" default="true" />
-        <xs:attribute name="loadXdebugStub" type="xs:boolean">
-            <xs:annotation>
-                <xs:documentation xml:lang="en">
-                    Default is runtime-specific: if not present, Psalm will only load the Xdebug stub if psalm has unloaded the extension.
-                </xs:documentation>
-
-                <!-- note: for PHPStorm to mark the attribute as deprecated the doc entry has to be *single line* and start with the word `deprecated` -->
-                <xs:documentation xml:lang="en">
-                    Deprecated. Extensions are now loaded based on composer.json and overridden with enableExtensions/disableExtensions.
-                </xs:documentation>
-            </xs:annotation>
-        </xs:attribute>
         <xs:attribute name="memoizeMethodCallResults" type="xs:boolean" default="false" />
         <xs:attribute name="rememberPropertyAssignmentsAfterCall" type="xs:boolean" default="true" />
         <xs:attribute name="resolveFromConfigFile" type="xs:boolean" default="true" />
diff --git a/docs/running_psalm/configuration.md b/docs/running_psalm/configuration.md
index ed9dd1605fe..8445b2da728 100644
--- a/docs/running_psalm/configuration.md
+++ b/docs/running_psalm/configuration.md
@@ -237,17 +237,6 @@ When `true`, Psalm will attempt to find all unused code (including unused variab
 ```
 When `true`, Psalm will report all `@psalm-suppress` annotations that aren't used, the equivalent of running with `--find-unused-psalm-suppress`. Defaults to `false`.
 
-#### loadXdebugStub
-```xml
-<psalm
-  loadXdebugStub="[bool]"
->
-```
-Deprecated, use &lt;enableExtensions&gt; instead.
-If not present, Psalm will only load the Xdebug stub if Psalm has unloaded the extension.
-When `true`, Psalm will load the Xdebug extension stub (as the extension is unloaded when Psalm runs).
-Setting to `false` prevents the stub from loading.
-
 #### ensureArrayStringOffsetsExist
 ```xml
 <psalm
diff --git a/src/Psalm/Config.php b/src/Psalm/Config.php
index 102b583cbdc..d00eefe6ff5 100644
--- a/src/Psalm/Config.php
+++ b/src/Psalm/Config.php
@@ -950,7 +950,6 @@ private static function fromXmlAndPaths(
             'ignoreInternalFunctionFalseReturn' => 'ignore_internal_falsable_issues',
             'ignoreInternalFunctionNullReturn' => 'ignore_internal_nullable_issues',
             'includePhpVersionsInErrorBaseline' => 'include_php_versions_in_error_baseline',
-            'loadXdebugStub' => 'load_xdebug_stub',
             'ensureArrayStringOffsetsExist' => 'ensure_array_string_offsets_exist',
             'ensureArrayIntOffsetsExist' => 'ensure_array_int_offsets_exist',
             'reportMixedIssues' => 'show_mixed_issues',