Follows proper autoloading standards (#3123)

* Follows proper autoloading standards
 - Splits PHP classes in descriptor.php into separate files
 - Splits MapFieldIter and RepeatedFieldIter into separate files
 - Moves descriptor.php to Internal/functions.php
 - Moves all namespaced functions into Iternal/functions.php

* fixes Makefile.am for added php files

* [PHP] moves all functions to GPBUtil

* removes description.php from the makefile

1 files changed, 1 insertions, 4 deletions

diff --git a/composer.json b/composer.json
index 2b04e079..5b6c7ee2 100644
--- a/composer.json
+++ b/composer.json
@@ -15,9 +15,6 @@
     "psr-4": {
       "Google\\Protobuf\\Internal\\": "php/src/Google/Protobuf/Internal",
       "GPBMetadata\\Google\\Protobuf\\Internal\\": "php/src/GPBMetadata/Google/Protobuf/Internal"
-    },
-    "files": [
-      "php/src/Google/Protobuf/descriptor.php"
-    ]
+    }
   }
 }