Remove unnecessary implementation of interface method in abstract class

src/Composer/DependencyResolver/Operation/SolverOperation.php

@@ -42,13 +42,4 @@ abstract class SolverOperation implements OperationInterface
     {
         return $this->reason;
     }
-
-    /**
-     * @param $lock bool Whether this is an operation on the lock file
-     * @return string
-     */
-    public function show($lock)
-    {
-        throw new \RuntimeException('abstract method needs to be implemented in subclass, not marked abstract for compatibility with PHP <= 5.3.8');
-    }
 }