Breaking Change: Remove deprecated PHP APIs FieldDescriptor getLabel, use IsRepeated or isRequired instead

https://protobuf.dev/news/2025-09-19/#php-remove-apis

PiperOrigin-RevId: 843474779

Author: anandolee

php/src/Google/Protobuf/FieldDescriptor.php

@@ -43,16 +43,6 @@ public function getNumber()
         return $this->internal_desc->getNumber();
     }
 
-    /**
-     * @deprecated Use isRepeated() or isRequired() instead.
-     *
-     * @return int
-     */
-    public function getLabel()
-    {
-        return $this->internal_desc->getLabel();
-    }
-
     /**
      * @return boolean
      */

php/src/Google/Protobuf/Internal/FieldDescriptor.php

@@ -99,11 +99,6 @@ public function setLabel($label)
         $this->label = $label;
     }
 
-    public function getLabel()
-    {
-        return $this->label;
-    }
-
     public function isRequired()
     {
         return $this->label === GPBLabel::REQUIRED;