Remove deprecation method (#42590)

Author: driesvints

src/Illuminate/Foundation/Bootstrap/HandleExceptions.php

@@ -76,21 +76,6 @@ public function handleError($level, $message, $file = '', $line = 0, $context =
         }
     }
 
-    /**
-     * Reports a deprecation to the "deprecations" logger.
-     *
-     * @param  string  $message
-     * @param  string  $file
-     * @param  int  $line
-     * @return void
-     *
-     * @deprecated Use handleDeprecationError instead.
-     */
-    public function handleDeprecation($message, $file, $line)
-    {
-        $this->handleDeprecationError($message, $file, $line);
-    }
-
     /**
      * Reports a deprecation to the "deprecations" logger.
      *