Remove redundant assertion

Author: Flamefire

test/framework/easyblock.py

@@ -1298,7 +1298,6 @@ def test_extensions_step(self):
         # test for proper error message without the exts_defaultclass set
         eb = EasyBlock(EasyConfig(self.eb_file))
         eb.installdir = config.install_path()
-        self.assertRaises(EasyBuildError, eb.extensions_step, fetch=True)
         self.assertErrorRegex(EasyBuildError, "No default extension class set", eb.extensions_step, fetch=True)
 
         # test if everything works fine if set