Do not (try to) manage php-scoper with Phive until humbug/php-scoper#307 has been resolved

Author: sebastianbergmann

phive.xml

@@ -4,5 +4,4 @@
   <phar name="php-cs-fixer" version="^2.14" installed="2.15.0" location="./tools/php-cs-fixer" copy="true"/>
   <phar name="phpdox" version="^0.11" installed="0.12.0" location="./tools/phpdox" copy="true"/>
   <phar name="phploc" version="^4.0" installed="4.0.1" location="./tools/phploc" copy="true"/>
-  <phar name="humbug/php-scoper" version="^0.11" installed="0.11.4" location="./tools/php-scoper" copy="true"/>
 </phive>