Remove unused methods from QueryShardContext.

Author: jtibshirani

server/src/main/java/org/elasticsearch/index/query/QueryShardContext.java

@@ -589,11 +589,4 @@ public BigArrays bigArrays() {
         return bigArrays;
     }
 
-    public SimilarityService getSimilarityService() {
-        return similarityService;
-    }
-
-    public BitsetFilterCache getBitsetFilterCache() {
-        return bitsetFilterCache;
-    }
 }