Readme: remove phar limitation (#59)

Author: janedbal

README.md

@@ -177,8 +177,6 @@ Another approach for DIC-only usages is to scan the generated php file, but that
   - Only classes with use statements and FQNs are detected
 - Function and constant usages are not analysed
   - Therefore, if some package contains only functions, it will be reported as unused
-- Phar-based packages (e.g. phpstan) are not present in classmap
-  - Beware that there are even some other vendor packages bundled inside the phpstan.phar
 
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