software/{cloudooo,nextcloud}: remove gcc version constraint

now that we have a patch to support gcc 8 we should support all known
versions of gcc

software/cloudooo/software-common.cfg

@@ -7,11 +7,6 @@ extends =
 parts =
   ${cloudooo-buildout:parts}
 
-[gcc]
-# For old version of glibmm.
-part = gcc-5.5
-max_version = 6
-
 [cloudooo-buildout]
 parts =
   ${stack-cloudooo-buildout:parts}

software/nextcloud/software.cfg

@@ -4,11 +4,6 @@ extends =
   ../../component/redis/buildout.cfg
   ../../stack/lamp/buildout.cfg
 
-[gcc]
-# For old version of glibmm.
-part = gcc-5.5
-max_version = 6
-
 [nc-download-base]
 recipe = hexagonit.recipe.download
 ignore-existing = true