configs,mem-ruby: Remove reference to old GPU ptls

GPU_VIPER_Baseline, GPU_VIPER_Region, and GPU_RfO were removed some time
ago.

Change-Id: If873b0cfe8cc2b3096cbe97d4e13a8e02d2ec567
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53703
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

configs/ruby/AMD_Base_Constructor.py

@@ -102,9 +102,7 @@ def define_options(parser):
     parser.add_argument("--cpu-to-dir-latency", type=int, default=15)
 
 def construct(options, system, ruby_system):
-    if (buildEnv['PROTOCOL'] != 'GPU_VIPER' or
-        buildEnv['PROTOCOL'] != 'GPU_VIPER_Region' or
-        buildEnv['PROTOCOL'] != 'GPU_VIPER_Baseline'):
+    if buildEnv['PROTOCOL'] != 'GPU_VIPER':
         panic("This script requires VIPER based protocols \
         to be built.")
     cpu_sequencers = []

src/mem/ruby/protocol/SConsopts

@@ -32,9 +32,6 @@ Import('*')
 
 main.Append(ALL_PROTOCOLS=[
     'GPU_VIPER',
-    'GPU_VIPER_Baseline',
-    'GPU_VIPER_Region',
-    'GPU_RfO',
     'MOESI_AMD_Base',
     'MESI_Two_Level',
     'MESI_Three_Level',