BIG-17565 Add function to remove a header from Connection object.

Author: bc-ravijayaramappa

src/Bigcommerce/Api/Connection.php

@@ -164,6 +164,15 @@ public function addHeader($header, $value)
         $this->headers[$header] = "$header: $value";
     }
 
+    /**
+     * Remove a header from the request.
+     * @param string $header
+     */
+    public function removeHeader($header)
+    {
+        unset($this->headers[$header]);
+    }
+
     /**
      * Get the MIME type that should be used for this request.
      */