remove unused method

Author: vladak

opengrok-indexer/src/main/java/org/opengrok/indexer/history/HistoryGuru.java

@@ -727,14 +727,6 @@ public void clearCacheFile(String path) {
         historyCache.clearFile(path);
     }
 
-    /**
-     * wrapper for {@link #removeCache(Collection, boolean)} with the {@code removeRepositories}
-     * parameter set to true.
-     */
-    public void removeCache(Collection<String> repositories) {
-        removeCache(repositories, true);
-    }
-
     /**
      * Remove history data for a list of repositories. Those that are
      * successfully cleared are removed from the internal list of repositories.