Generic/AbstractClassNamePrefix: replace code comment instead of remove

Author: jrfnl

src/Standards/Generic/Sniffs/NamingConventions/AbstractClassNamePrefixSniff.php

@@ -45,6 +45,7 @@ public function process(File $phpcsFile, $stackPtr)
 
         $className = $phpcsFile->getDeclarationName($stackPtr);
         if ($className === null) {
+            // Live coding or parse error.
             return;
         }