slapos/obs: don't force to compile gcci

This reverts 80af2841 and b4f83dd0.

We will force to compile gcc only in the machine preparing the source but not in the OBS machines actually compiling the packages.

component/slapos/obs.cfg

@@ -13,10 +13,6 @@ extensions =
 extends-cache = extends-cache
 download-cache = download-cache
 
-[gcc]
-# force usage of gcc from slapos
-max_version = 0
-
 # Uguu, upstream buildout.cfg must be patched as it works the other way
 # around from a packager point of view at least, thus at the end static
 # path, such as Python HOME directory, are wrong...