Removed stale documentation and fixed some erroneous spacing

Author: Ilya Ganelin

core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala

@@ -95,7 +95,7 @@ class DAGScheduler(
 
   // Stages that must be resubmitted due to fetch failures
   private[scheduler] val failedStages = new HashSet[Stage]
-  
+
   private[scheduler] val activeJobs = new HashSet[ActiveJob]
 
   /**

docs/configuration.md

@@ -1153,14 +1153,6 @@ Apart from these, the following properties are also available, and may be useful
     Should be greater than or equal to 1. Number of allowed retries = this value - 1.
   </td>
 </tr>
-<tr>
-  <td><code>spark.stage.maxFailures</code></td>
-  <td>5</td>
-  <td>
-    Number of individual stage failures before aborting the stage and not retrying it.
-    Should be greater than or equal to 1. Number of allowed retries = this value - 1.
-  </td>
-</tr>
 </table>
 
 #### Dynamic Allocation