Revert "slapos-testing: add libnetworkcache egg as dependency."

This reverts commit 6909fe3b.

software/slapos-testing/software.cfg

@@ -33,7 +33,6 @@ eggs =
   slapos.cookbook
   collective.recipe.template
   plone.recipe.command
-  slapos.libnetworkcache
 entry-points =
   runTestSuite=erp5.util.testsuite:runTestSuite
 scripts =
@@ -94,4 +93,3 @@ collective.recipe.template = 1.10
 plone.recipe.command = 1.1
 slapos.recipe.build = 0.12
 slapos.recipe.template = 2.5
-slapos.libnetworkcache = 0.14.1