Disable indexes if maven3 is used.

plugins/maven/src/main/java/org/jetbrains/idea/maven/indices/MavenIndices.java

@@ -50,6 +50,9 @@ public class MavenIndices {
     File[] indices = myIndicesDir.listFiles();
     if (indices == null) return;
     Arrays.sort(indices);
+
+    if (Boolean.getBoolean("idea.use.maven3")) return;
+
     for (File each : indices) {
       if (!each.isDirectory()) continue;
 

plugins/maven/src/main/java/org/jetbrains/idea/maven/indices/MavenIndicesManager.java

@@ -171,6 +171,8 @@ public class MavenIndicesManager {
 
     MavenIndices indicesObjectCache = getIndicesObject();
 
+    if (Boolean.getBoolean("idea.use.maven3")) return new ArrayList<MavenIndex>(result);
+
     try {
       MavenIndex localIndex = indicesObjectCache.add(LOCAL_REPOSITORY_ID, localRepository.getPath(), MavenIndex.Kind.LOCAL);
       result.add(localIndex);