Red code legacy renderer (#383)

- Remove some references to gEnv->pRenderer/GetIEditor()->GetRenderer() that is now always null.
- Restore the debug console to existence.
- Stop building the following in preparation for their removal:

Code/CryEngine/Cry3DEngine/*
Code/CryEngine/RenderDll/*
Code/Tools/CryFXC/*
Code/Tools/HLSLCrossCompiler/*
Code/Tools/HLSLCrossCompilerMETAL/*
Code/Tools/RC/*
Code/Tools/ShaderCacheGen/*
Tools/CrySCompileServer/*

Code/CryEngine/CrySystem/Platform/Mac/platform_mac.cmake

@@ -14,14 +14,3 @@
 # NOTE: functions in cmake are global, therefore adding functions to this file
 # is being avoided to prevent overriding functions declared in other targets platfrom
 # specific cmake files
-
-if (LY_MONOLITHIC_GAME) # Only Atom is supported in monolithic builds
-    set(LY_BUILD_DEPENDENCIES
-        PUBLIC
-            Legacy::CryRenderOther
-    )
-else()
-    set(LY_RUNTIME_DEPENDENCIES
-        Legacy::CryRenderMetal
-    )
-endif()