Issue #2756253 by neerajsingh: Remove @file tag docblock

src/Entity/MigrationInterface.php

src/Event/MigrateEvents.php

src/Event/MigratePrepareRowEvent.php

src/Plugin/Discovery/ConfigEntityDiscovery.php

src/Plugin/MigrationConfigEntityPluginManager.php

src/Plugin/migrate/source/SourcePluginExtension.php

src/Plugin/migrate/source/Url.php

src/Plugin/migrate_plus/data_fetcher/Http.php

src/Plugin/migrate_plus/data_parser/Json.php

src/Tests/MigrationConfigEntityTest.php

src/Tests/MigrationGroupTest.php