Remove all public modifiers to ChangeChecker interface

Interfaces have all methods public by definition, the 'public'
modifier is therefore redundant and can be removed.

Change-Id: If3691cda262ffdde5dec0aa2c22fb5aa3d88d274

src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java
index 3277150..4a081d0 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java
@@ -27,7 +27,7 @@
    *
    * @return notes of the Change
    */
-  public Optional<ChangeNotes> getChangeNotes();
+  Optional<ChangeNotes> getChangeNotes();
 
   /**
    * Create a new index event POJO associated with the current Change.
@@ -39,7 +39,7 @@
    * @return new IndexEvent
    * @throws IOException if the current Change cannot read
    */
-  public Optional<ChangeIndexEvent> newIndexEvent(String projectName, int changeId, boolean deleted)
+  Optional<ChangeIndexEvent> newIndexEvent(String projectName, int changeId, boolean deleted)
       throws IOException;
 
   /**
@@ -48,7 +48,7 @@
    * @param indexEvent indexing event
    * @return true if the local Change is up-to-date, false otherwise.
    */
-  public boolean isUpToDate(Optional<ChangeIndexEvent> indexEvent);
+  boolean isUpToDate(Optional<ChangeIndexEvent> indexEvent);
 
   /**
    * Return the last computed up-to-date Change time-stamp.
@@ -58,12 +58,12 @@
    * @return the Change timestamp epoch in seconds
    * @throws IOException if an I/O error occurred while reading the local Change
    */
-  public Optional<Long> getComputedChangeTs() throws IOException;
+  Optional<Long> getComputedChangeTs() throws IOException;
 
   /**
    * Check if the local Change contains current patchset refs
    *
    * @return true if local change contains meta and current patchset refs
    */
-  public boolean isChangeConsistent();
+  boolean isChangeConsistent();
 }