Remove unreachable code

Author: villfa

src/FakePdoStatementTrait.php

@@ -389,7 +389,7 @@ public function fetch(
 
     /**
      * @param int $column
-     * @return mixed
+     * @return null|scalar
      */
     public function fetchColumn($column = 0)
     {

src/Parser/SQLParser.php

@@ -197,7 +197,6 @@ private static function parseImpl(string $sql)
             default:
                 throw new ParserException("Unexpected {$token->value}");
         }
-        throw new ParserException("Parse error: unexpected end of input");
     }
 
     /**

src/Processor/Expression/UnaryEvaluator.php

@@ -39,7 +39,5 @@ public static function evaluate(
             default:
                 throw new ProcessorException("Unimplemented unary operand {$expr->name}");
         }
-
-        return $val;
     }
 }