remove executable_group from config

src/gmhc_config_schema.erl

@@ -65,8 +65,7 @@ pool_admin() ->
 
 workers() ->
     array(
-      #{default => [#{executable => <<"mean29-generic">>,
-                      executable_group => <<"cpu">>}],
+      #{default => [#{executable => <<"mean29-generic">>}],
         description =>
             <<"Definitions of workers' configurations. If no worker are configured one worker "
               "is used as default, i.e. 'mean29-generic' executable without any extra args.">>},
@@ -81,10 +80,6 @@ workers() ->
                             "\"lean29-generic\" (CPU-intensive, useful if memory-constrained), "
                             "\"lean29-avx2\" (CPU-intensive, useful if memory-constrained, benefits "
                             "from faster CPU supporting AVX2 instructions).">>}),
-            executable_group =>
-                str(#{description => <<"Group of executable binaries of the worker.">>,
-                      enum => [ <<"cpu">>, <<"cuda">> ],
-                      default => <<"cpu">>}),
             extra_args =>
                 str(#{description => <<"Extra arguments to pass to the worker executable binary. "
                                        "The safest choice is specifying no arguments i.e. empty string.">>,