Removed php7cc. Not updated in a while, has outdated dependencies and conflicts with Tombstone Analyzer

Author: frenck

README.md

@@ -22,7 +22,6 @@ You'll get the following tools by depending on this package:
 * **[PHP Coding Standards Fixer]**: A tool to automatically fix PHP coding standards issues
 * **[PHP Parallel Lint]**: Check syntax of PHP files faster than serial check with fancier output
 * **[PHP_CodeSniffer]**: Detects violations of a defined set of coding standards
-* **[php7cc]**: PHP 7 Compatibility Checker
 
 ### Quality Assistance
 
@@ -77,7 +76,6 @@ The following packages are suggested:
 [PHP Parallel Lint]: https://github.com/JakubOnderka/PHP-Parallel-Lint
 [PHP_CodeSniffer]: https://github.com/squizlabs/PHP_CodeSniffer
 [PHP_Depend]: https://github.com/pdepend/pdepend
-[php7cc]: https://github.com/sstalle/php7cc
 [PHPCPD]: https://github.com/sebastianbergmann/phpcpd
 [PHPLOC]: https://github.com/sebastianbergmann/phploc
 [PHPMD]: https://phpmd.org

composer.json

@@ -46,7 +46,6 @@
     "seld/jsonlint": "^1.4.0",
     "sensiolabs/security-checker": "^4.0",
     "sllh/composer-versions-check": "^2.0.0",
-    "sstalle/php7cc": "^1.1.0",
     "squizlabs/php_codesniffer": "^2.5",
     "scheb/tombstone-analyzer": "^0.3.0",