Changes default Collector to be modern.

Earlier we decided to have the modern implementations as
default when useragent is not inherited.

In this case modern is already fallbacks to legacy so we
don't even need to explicitly bind it for IE8/IE9.

Change-Id: I025ec627857bbe874f65b53a8f8bc6edeb493d8f
diff --git a/user/src/com/google/gwt/core/CoreWithUserAgent.gwt.xml b/user/src/com/google/gwt/core/CoreWithUserAgent.gwt.xml
index fdbc39a..2026c35 100644
--- a/user/src/com/google/gwt/core/CoreWithUserAgent.gwt.xml
+++ b/user/src/com/google/gwt/core/CoreWithUserAgent.gwt.xml
@@ -29,16 +29,6 @@
     </none> 
   </set-property>
 
-  <replace-with class="com.google.gwt.core.client.impl.StackTraceCreator.CollectorModernNoSourceMap">
-    <when-type-is class="com.google.gwt.core.client.impl.StackTraceCreator.Collector" />
-    <when-property-is name="compiler.stackMode" value="native" />
-    <any>
-      <when-property-is name="user.agent" value="gecko1_8" />
-      <when-property-is name="user.agent" value="ie10"/>
-      <when-property-is name="user.agent" value="safari" />
-    </any>
-  </replace-with>
-
   <replace-with class="com.google.gwt.core.client.impl.StackTraceCreator.CollectorModern">
     <when-type-is class="com.google.gwt.core.client.impl.StackTraceCreator.Collector" />
     <when-property-is name="compiler.stackMode" value="native" />
diff --git a/user/src/com/google/gwt/core/StackTrace.gwt.xml b/user/src/com/google/gwt/core/StackTrace.gwt.xml
index 92bfde2..699bb1f 100644
--- a/user/src/com/google/gwt/core/StackTrace.gwt.xml
+++ b/user/src/com/google/gwt/core/StackTrace.gwt.xml
@@ -40,7 +40,7 @@
     <when-property-is name="compiler.stackMode" value="emulated" />
   </replace-with>
 
-  <replace-with class="com.google.gwt.core.client.impl.StackTraceCreator.CollectorLegacy">
+  <replace-with class="com.google.gwt.core.client.impl.StackTraceCreator.CollectorModernNoSourceMap">
     <when-type-is class="com.google.gwt.core.client.impl.StackTraceCreator.Collector" />
     <when-property-is name="compiler.stackMode" value="native" />
   </replace-with>