[5.4] cs fixes

Author: nicolas-grekas

Diff for: Parser/TokenStream.php

@@ -120,8 +120,6 @@ public function getUsed(): array
     /**
      * Returns next identifier token.
      *
-     * @return string
-     *
      * @throws SyntaxErrorException If next token is not an identifier
      */
     public function getNextIdentifier(): string
@@ -138,8 +136,6 @@ public function getNextIdentifier(): string
     /**
      * Returns next identifier or null if star delimiter token is found.
      *
-     * @return string|null
-     *
      * @throws SyntaxErrorException If next token is not an identifier or a star delimiter
      */
     public function getNextIdentifierOrStar(): ?string