Remove unnecessary annotation

composer.json

@@ -40,6 +40,7 @@
     },
     "require-dev": {
         "ext-curl": "*",
+        "amphp/amp": "^2.4.2",
         "bamarni/composer-bin-plugin": "^1.2",
         "brianium/paratest": "^4.0.0",
         "phpmyadmin/sql-parser": "5.1.0",

src/Psalm/Internal/LanguageServer/ProtocolStreamReader.php

@@ -53,7 +53,6 @@ class ProtocolStreamReader implements ProtocolReader
              */
             function () use ($input) : \Generator {
                 while ($this->is_accepting_new_requests) {
-                    /** @var Promise<?string> */
                     $read_promise = $input->read();
 
                     $chunk = yield $read_promise;