Remove first argument of Schema::isModule

The argument wasn't used anywhere, I have no idea why it was there.

Change-Id: I21b9c3fa323187e5f0484d4db9e2c543f9a6f7cf
diff --git a/tests/yang.cpp b/tests/yang.cpp
index 6ce0fb2..64bf08e 100644
--- a/tests/yang.cpp
+++ b/tests/yang.cpp
@@ -360,7 +360,7 @@
         }
         SECTION("isModule")
         {
-            REQUIRE(ys.isModule(path, "example-schema"));
+            REQUIRE(ys.isModule("example-schema"));
         }
         SECTION("isList")
         {
@@ -809,7 +809,7 @@
 
         SECTION("nonexistent module")
         {
-            REQUIRE(!ys.isModule(path, "notAModule"));
+            REQUIRE(!ys.isModule("notAModule"));
         }
 
         SECTION("leafIdentityIsValid")