A quick fix for Asset Processor automated tests (#644)

These tests broke because RC.EXE is no longer a thing.

A more comprehensive fix and cleanup needs to be performed to
properly remove references to it while still keeping the existing
tests and other things.  This just removes as little as is possible
to avoid error.

Code/Tools/AssetProcessor/native/unittests/MockApplicationManager.cpp

@@ -47,7 +47,7 @@ namespace AssetProcessor
         {
         }
 
-        bool Initialize([[maybe_unused]] const QString& systemRoot, [[maybe_unused]] const QString& rcExecutableFullPath) override
+        bool Initialize() override
         {
             m_initialize++;
             return m_initializeResult;