ruby: remove call to curCycle in panic()

The panic() function already prints the current tick value. This call to
curCycle() is as such redundant. Since we are trying to move towards multiple
clock domains, this call will print misleading time.

src/mem/slicc/ast/AST.py

@@ -54,7 +54,6 @@ class AST(PairContainer):
             message = message % args
         code = self.slicc.codeFormatter()
         code('''
-panic("Runtime Error at ${{self.location}}, Ruby Time: %d, %s.\\n",
-    curCycle(), $message);
+panic("Runtime Error at ${{self.location}}: %s.\\n", $message);
 ''')
         return code