strike sendgrid

1. comment out send grid for testing as it’s seriously out of date.
2. remove spurious CONTRIBUTING and LICENSE from subdirectories.

Author: Les Vogel

appengine-java8/pom.xml

@@ -70,7 +70,9 @@
 
     <module>search</module>
 
+<!--
     <module>sendgrid</module>
+ -->
 
     <module>spanner</module>
 

appengine/pom.xml

@@ -71,7 +71,9 @@
         <module>oauth2</module>
         <module>requests</module>
         <module>search</module>
+<!--
         <module>sendgrid</module>
+ -->
         <module>remote/remote-client</module>
         <module>remote/remote-server</module>
         <module>static-files</module>

flexible/CONTRIBUTING.md

@@ -63,7 +63,9 @@
         <module>flexible/mailjet</module>
         <module>flexible/memcache</module>
         <module>flexible/pubsub</module>
+<!--
         <module>flexible/sendgrid</module>
+ -->
         <module>flexible/sparkjava</module>
         <module>flexible/static-files</module>
         <module>flexible/twilio</module>