Revert "Initial changes for Linux support"

This reverts commit 029fbc30248fe7335501f7956b25cfdc038129e5.

The above commit appears to have broke our CB.

src/com/google/enterprise/adaptor/fs/FsAdaptor.java

diff --git a/src/com/google/enterprise/adaptor/fs/FsAdaptor.java b/src/com/google/enterprise/adaptor/fs/FsAdaptor.java
index f00d3a9..60343f9 100644
--- a/src/com/google/enterprise/adaptor/fs/FsAdaptor.java
+++ b/src/com/google/enterprise/adaptor/fs/FsAdaptor.java
@@ -179,15 +179,12 @@
   private FileTimeFilter lastAccessTimeFilter;
 
   public FsAdaptor() {
-    String osName = System.getProperty("os.name");
-    if (osName.startsWith("Windows")) {
+    // At the moment, we only support Windows.
+    if (System.getProperty("os.name").startsWith("Windows")) {
       delegate = new WindowsFileDelegate();
-    } else if (osName.startsWith("Linux")) {
-      delegate = new LinuxFileDelegate();
     } else {
       throw new IllegalStateException(
-          "This is a non-supported platform. The Connector for File Systems"
-          + " only supports the Windows and Linux platforms.");
+          "Windows is the only supported platform.");
     }
   }
 
@@ -262,11 +259,7 @@
             " is not a supported DFS path. Only DFS links of the format " +
             "\\\\host\\namespace\\link are supported.");
       }
-    // TODO: Skip the "is root" check on Linux for now. We need to determine
-    // an approach at verifying that the src path is the mount point of the
-    // UNC path and that the UNC path is a root UNC (i.e. of the form
-    // \\host\share).
-    } else if (System.getProperty("os.name").startsWith("Windows")) {
+    } else {
       if (!rootPath.equals(rootPath.getRoot())) {
         // We currently only support a config path that is a root.
         // Non-root paths will fail to produce Acls for all the folders up

src/com/google/enterprise/adaptor/fs/LinuxFileDelegate.java

diff --git a/src/com/google/enterprise/adaptor/fs/LinuxFileDelegate.java b/src/com/google/enterprise/adaptor/fs/LinuxFileDelegate.java
deleted file mode 100644
index b889c1d..0000000
--- a/src/com/google/enterprise/adaptor/fs/LinuxFileDelegate.java
+++ /dev/null
@@ -1,75 +0,0 @@
-// Copyright 2014 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.google.enterprise.adaptor.fs;
-
-import com.google.enterprise.adaptor.AsyncDocIdPusher;
-import com.google.enterprise.adaptor.DocId;
-
-import java.io.IOException;
-import java.nio.file.attribute.AclEntry;
-import java.nio.file.attribute.AclFileAttributeView;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.util.Collections;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-class LinuxFileDelegate extends NioFileDelegate {
-  private static final Logger log
-      = Logger.getLogger(LinuxFileDelegate.class.getName());
-
-  @Override
-  public AclFileAttributeViews getAclViews(Path doc) throws IOException {
-    // TODO(mifern): Add Acl support.
-    return new AclFileAttributeViews(
-        new SimpleAclFileAttributeView(Collections.<AclEntry>emptyList()),
-        new SimpleAclFileAttributeView(Collections.<AclEntry>emptyList()));
-  }
-
-  @Override
-  public AclFileAttributeView getShareAclView(Path doc) throws IOException {
-    // TODO(mifern): Add share Acl support.
-    return new SimpleAclFileAttributeView(Collections.<AclEntry>emptyList());
-  }
-
-  @Override
-  public AclFileAttributeView getDfsShareAclView(Path doc) {
-    // TODO(mifern): Add DFS support.
-    return new SimpleAclFileAttributeView(Collections.<AclEntry>emptyList());
-  }
-
-  @Override
-  public Path getDfsUncActiveStorageUnc(Path doc) throws IOException {
-    // TODO(mifern): Add DFS support.
-    return null;
-  }
-
-  @Override
-  public void startMonitorPath(Path watchPath, AsyncDocIdPusher pusher)
-      throws IOException {
-    // TODO(mifern): Start monitoring.
-  }
-
-  @Override
-  public void stopMonitorPath() {
-    // TODO(mifern): Not sure what monitoring we will have but we need
-    //  to stop it.
-  }
-
-  @Override
-  public void destroy() {
-    // TODO(mifern): Destroy any resrouces created for monitoring.
-  }
-}