config: remove ruby's requirement on the timing cmd line param

Since ruby only works in timing mode, explicitly requiring the timing cmd line
param to be specified is not necessary.

configs/example/ruby_fs.py

@@ -103,7 +103,6 @@ else:
 # fast forward with the atomic cpu and instead set the FutureClass to None.
 # Therefore the cpus resolve to the correct names and unserialize correctly.
 #
-assert(options.timing)
 class CPUClass(TimingSimpleCPU): pass
 test_mem_mode = 'timing'
 FutureClass = None

configs/example/ruby_se.py

@@ -134,14 +134,12 @@ if options.detailed:
             process += [smt_process, ]
             smt_idx += 1
 
-(CPUClass, test_mem_mode, FutureClass) = Simulation.setCPUClass(options)
-
 #
 # Currently ruby only works in timing mode 
 #
-assert(options.timing)
-assert(test_mem_mode == 'timing')
-assert(FutureClass == None)
+class CPUClass(TimingSimpleCPU): pass
+test_mem_mode = 'timing'
+FutureClass = None
 
 CPUClass.clock = options.clock