Remove unused variable assignments

MDErrorReporter.php

@@ -107,9 +107,8 @@ final class MDErrorReporter {
                 $msg .= \sprintf("%-{$longestKey}s :: %s", $key, (string)$value) . PHP_EOL;
             }
         }
-        $msg .= PHP_EOL;
 
-        return $msg;
+        return $msg . PHP_EOL;
 
     }
 
@@ -120,15 +119,13 @@ final class MDErrorReporter {
      */
     public function getAdditionalDebuggingInfo():array {
 
-        $output = [
+        return [
             "Current memory usage" => $this->human_filesize(\memory_get_usage()),
             "Peak memory usage" => $this->human_filesize(\memory_get_peak_usage()),
             "Included / required files" => \get_included_files(),
             # "Allowed memory usage" => $this->human_filesize((int)ini_get("memory_limit")),
         ];
 
-        return $output;
-
     }
 
     /**