Replace all definitions of Unit by import codeql.util.Unit

javascript/ql/lib/qlpack.yml

@@ -8,5 +8,6 @@ upgrades: upgrades
 dependencies:
   codeql/regex: ${workspace}
   codeql/tutorial: ${workspace}
+  codeql/util: ${workspace}
 dataExtensions:
   - semmle/javascript/frameworks/**/model.yml

javascript/ql/lib/semmle/javascript/Unit.qll

@@ -1,10 +1,3 @@
 /** Provides the `Unit` class. */
 
-/** The unit type. */
-private newtype TUnit = TMkUnit()
-
-/** The trivial type with a single element. */
-class Unit extends TUnit {
-  /** Gets a textual representation of this element. */
-  string toString() { result = "Unit" }
-}
+import codeql.util.Unit