Revert "Fix GWT UI AddFileBox to provide path suggestions continuously"

This reverts commit 15615078df91a5c8c9624467bf1542c9b6f13f06. This
commit breakes the ReviewerSuggestOracle. A new change will create
to fix the PathSuggestOracle.

Change-Id: I330de9d63f5fbe625cc6d552605c64616bae5f63
diff --git a/gerrit-gwtui-common/src/main/java/com/google/gerrit/client/ui/RemoteSuggestOracle.java b/gerrit-gwtui-common/src/main/java/com/google/gerrit/client/ui/RemoteSuggestOracle.java
index 41bf8ce..d66d6a6 100644
--- a/gerrit-gwtui-common/src/main/java/com/google/gerrit/client/ui/RemoteSuggestOracle.java
+++ b/gerrit-gwtui-common/src/main/java/com/google/gerrit/client/ui/RemoteSuggestOracle.java
@@ -104,9 +104,6 @@
     }
 
     void start() {
-      if (request.getQuery() == null) {
-        request.setQuery("");
-      }
       oracle.requestSuggestions(request, this);
     }