Remove unused method ReplicationFileBasedConfig.getCfgPath

The `ReplicationFileBasedConfig.getCfgPath()` is not longer used in the
plugin, therefore it can be safely removed.

Change-Id: I387bc0bd4b6f19cab3475be4aac939352b7dbeb4

src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationFileBasedConfig.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationFileBasedConfig.java b/src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationFileBasedConfig.java
index 93990f4..eed7556 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationFileBasedConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationFileBasedConfig.java
@@ -115,10 +115,6 @@
     return pluginDataDir;
   }
 
-  Path getCfgPath() {
-    return cfgPath;
-  }
-
   @Override
   public Config getConfig() {
     return config;