remove last traces of watershedphp

Author: garemoko

.gitmodules

@@ -1,6 +1,3 @@
 [submodule "TinCanPHP"]
 	path = TinCanPHP
 	url = https://github.com/garemoko/TinCanPHP.git
-[submodule "WatershedPHP"]
-	path = WatershedPHP
-	url = https://github.com/WatershedLRS/WatershedPHP.git

lib.php

@@ -33,9 +33,6 @@
 // TinCanPHP - required for interacting with the LRS in tincanlaunch_get_statements.
 require_once("$CFG->dirroot/mod/tincanlaunch/TinCanPHP/autoload.php");
 
-// WatershedPHP - required for Watershed integration.
-require_once("$CFG->dirroot/mod/tincanlaunch/WatershedPHP/watershed.php");
-
 // SCORM library from the SCORM module. Required for its xml2Array class by tincanlaunch_process_new_package.
 require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");