[Premake] Removed unused/unnecessary subprojects.

- Testing currently doesn't work
- VFS Dump is unused. You can use internal function for it
- Demos are only for fun
- Trace Dump & Trace Viewer (unsure, but ok)

You can re-enable them by changing values: enableTests and enableMiscSubprojects in main premake file.

In the future there should be xb command support to overwrite them

premake5.lua

@@ -7,6 +7,11 @@ location(build_root)
 targetdir(build_bin)
 objdir(build_obj)
 
+-- Define variables for enabling specific submodules
+-- Todo: Add changing from xb command
+enableTests = false
+enableMiscSubprojects = false
+
 -- Define an ARCH variable
 -- Only use this to enable architecture-specific functionality.
 if os.istarget("linux") then