Remove ECatcher from GAE code

It's superceded by Stackdriver Trace.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=145440930

java/google/registry/env/alpha/default/WEB-INF/cron.xml

@@ -185,6 +185,4 @@
     <schedule>every 15 minutes</schedule>
     <target>backend</target>
   </cron>
-
-
 </cronentries>

java/google/registry/env/common/backend/WEB-INF/web.xml

@@ -356,5 +356,4 @@
     <filter-name>OfyFilter</filter-name>
     <url-pattern>/*</url-pattern>
   </filter-mapping>
-
 </web-app>

java/google/registry/env/common/default/WEB-INF/web.xml

@@ -165,5 +165,4 @@
     <filter-name>OfyFilter</filter-name>
     <url-pattern>/*</url-pattern>
   </filter-mapping>
-
 </web-app>

java/google/registry/env/common/tools/WEB-INF/web.xml

@@ -193,5 +193,4 @@
     <filter-name>OfyFilter</filter-name>
     <url-pattern>/*</url-pattern>
   </filter-mapping>
-
 </web-app>

java/google/registry/env/crash/default/WEB-INF/cron.xml

@@ -146,5 +146,4 @@
     <target>backend</target>
   </cron>
 
-
 </cronentries>

java/google/registry/env/production/default/WEB-INF/cron.xml

@@ -240,5 +240,4 @@
     <target>backend</target>
   </cron>
 
-
 </cronentries>

java/google/registry/env/sandbox/default/WEB-INF/cron.xml

@@ -162,5 +162,4 @@
     <target>backend</target>
   </cron>
 
-
 </cronentries>