Remove unused imports

Change-Id: I654f1a5c299d8062fdc6bee8e36e8bc18b402b2b

gitiles-servlet/src/main/java/com/google/gitiles/PathServlet.java

diff --git a/gitiles-servlet/src/main/java/com/google/gitiles/PathServlet.java b/gitiles-servlet/src/main/java/com/google/gitiles/PathServlet.java
index e0cc53e..da9138e 100644
--- a/gitiles-servlet/src/main/java/com/google/gitiles/PathServlet.java
+++ b/gitiles-servlet/src/main/java/com/google/gitiles/PathServlet.java
@@ -23,7 +23,6 @@
 import static org.eclipse.jgit.lib.Constants.OBJ_TREE;
 
 import com.google.common.base.Joiner;
-import com.google.common.base.Strings;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Lists;

gitiles-servlet/src/main/java/com/google/gitiles/TreeJsonData.java

diff --git a/gitiles-servlet/src/main/java/com/google/gitiles/TreeJsonData.java b/gitiles-servlet/src/main/java/com/google/gitiles/TreeJsonData.java
index 70dcf9a..998d546 100644
--- a/gitiles-servlet/src/main/java/com/google/gitiles/TreeJsonData.java
+++ b/gitiles-servlet/src/main/java/com/google/gitiles/TreeJsonData.java
@@ -15,7 +15,6 @@
 package com.google.gitiles;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
-import static com.google.common.base.Preconditions.checkNotNull;
 
 import com.google.common.collect.Lists;
 
@@ -23,8 +22,6 @@
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.FileMode;
 import org.eclipse.jgit.lib.ObjectId;
-import org.eclipse.jgit.lib.ObjectReader;
-import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.treewalk.TreeWalk;
 
 import java.io.IOException;