Revert "Add groups to command reference"

docs/source/code_examples/macro_commands/prep.ys

@@ -1,23 +0,0 @@
-#start:The following commands are executed by this synthesis command:
-#end:$
-begin:
-    hierarchy -check [-top <top> | -auto-top]
-
-coarse:
-    proc [-ifx]
-    flatten    (if -flatten)
-    future
-    opt_expr -keepdc
-    opt_clean
-    check
-    opt -noff -keepdc
-    wreduce -keepdc [-memx]
-    memory_dff    (if -rdff)
-    memory_memx    (if -memx)
-    opt_clean
-    memory_collect
-    opt -noff -keepdc -fast
-
-check:
-    stat
-    check