Clean up .gitignore

Change-Id: Ife815f7e5e1ddbafc0ed2432ac59be509e9a8d40
diff --git a/.gitignore b/.gitignore
index 1caf4e1..943b0ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,5 @@
-target
-.classpath
-.project
-/.settings/org.maven.ide.eclipse.prefs
-/.settings/org.eclipse.m2e.core.prefs
+/.classpath
 /.primary_build_tool
+/.project
+/.settings
 /bazel-*