Remove Xdebug from php-extra runs.

.travis.yml

@@ -58,7 +58,6 @@ before_install:
       export PHPUNIT_X="$PHPUNIT --exclude-group tty,benchmark,intl-data"
       export COMPOSER_UP='composer update --no-progress --ansi'
       export COMPONENTS=$(find src/Symfony -mindepth 2 -type f -name phpunit.xml.dist -printf '%h\n' | sort)
-      find ~/.phpenv -name xdebug.ini -delete
 
       nanoseconds () {
           local cmd="date"
@@ -137,6 +136,7 @@ before_install:
               echo extension = memcached.so >> $INI
           fi
       done
+      find ~/.phpenv -name xdebug.ini -delete
 
     - |
       # Install extra PHP extensions