Issue #3446967 by kim.pepper, alexpott: [11.x] Remove deprecated methods in InputStreamUploadedFile

(cherry picked from commit c5ea6561)

core/modules/file/src/Upload/InputStreamUploadedFile.php

@@ -56,27 +56,6 @@ public function getPathname(): string {
     throw new \BadMethodCallException(__METHOD__ . ' not implemented');
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public function isValid(): bool {
-    throw new \BadMethodCallException(__METHOD__ . ' not implemented');
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getErrorMessage(): string {
-    throw new \BadMethodCallException(__METHOD__ . ' not implemented');
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getError(): int {
-    throw new \BadMethodCallException(__METHOD__ . ' not implemented');
-  }
-
   /**
    * {@inheritdoc}
    */