Adapt the change in Gerrit core

Since change I9037aa7a3 ProjectCache#remove no longer throws
IOException.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Ifa2c8294da3c639aedfb171ff28d9a426cf02221

src/main/java/com/googlesource/gerrit/plugins/deleteproject/cache/CacheDeleteHandler.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/deleteproject/cache/CacheDeleteHandler.java b/src/main/java/com/googlesource/gerrit/plugins/deleteproject/cache/CacheDeleteHandler.java
index c453478..bdf3ff5 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/deleteproject/cache/CacheDeleteHandler.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/deleteproject/cache/CacheDeleteHandler.java
@@ -17,7 +17,6 @@
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.inject.Inject;
-import java.io.IOException;
 
 public class CacheDeleteHandler {
 
@@ -28,7 +27,7 @@
     this.projectCache = projectCache;
   }
 
-  public void delete(Project project) throws IOException {
+  public void delete(Project project) {
     projectCache.remove(project);
   }
 }