Remove obsolete Context methods

These methods should have been removed in f2cfb9f (PHPLIB-879) and 20e8f91 (PHPLIB-652).

Author: jmikola

tests/SpecTests/Context.php

@@ -88,15 +88,6 @@ public function enableEncryption(): void
         $this->useEncryptedClient = true;
     }
 
-    public static function fromChangeStreams(stdClass $test, $databaseName, $collectionName)
-    {
-        $o = new self($databaseName, $collectionName);
-
-        $o->client = FunctionalTestCase::createTestClient();
-
-        return $o;
-    }
-
     public static function fromClientSideEncryption(stdClass $test, $databaseName, $collectionName)
     {
         $o = new self($databaseName, $collectionName);
@@ -145,15 +136,6 @@ public static function fromClientSideEncryption(stdClass $test, $databaseName, $
         return $o;
     }
 
-    public static function fromCommandMonitoring(stdClass $test, $databaseName, $collectionName)
-    {
-        $o = new self($databaseName, $collectionName);
-
-        $o->client = FunctionalTestCase::createTestClient();
-
-        return $o;
-    }
-
     public static function fromCrud(stdClass $test, $databaseName, $collectionName)
     {
         $o = new self($databaseName, $collectionName);