Only cache composer files on AppVeyor

Author: WyriHaximus

appveyor.yml

@@ -22,10 +22,6 @@ environment:
 ## Cache composer, chocolatey and php bits
 cache:
     - '%LOCALAPPDATA%\Composer\files -> composer.lock'
-    - composer.phar
-    - C:\ProgramData\chocolatey\bin -> .appveyor.yml
-    - C:\ProgramData\chocolatey\lib -> .appveyor.yml
-    - c:\tools\php -> .appveyor.yml
 
 ## Set up environment varriables
 init:
@@ -56,4 +52,4 @@ install:
 ## Run the actual test
 test_script:
     - cd c:\projects\php-project-workspace
-    - vendor/bin/phpunit -c phpunit.xml.dist
+    - vendor/bin/phpunit -c phpunit.xml.dist