util: cxxConfigInit has been removed by gem5

This was merged in [1]

[1]: https://gem5-review.googlesource.com/c/public/gem5/+/49455

Change-Id: Iba558dd01d5c8fbc05e4d3a106a3e3ff6b696333
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/66851
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Daniel Carvalho <odanrc@yahoo.com.br>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Matthias Jung <jungma@eit.uni-kl.de>

util/tlm/src/sim_control.cc

@@ -72,8 +72,6 @@ Gem5SimControl::Gem5SimControl(sc_core::sc_module_name name,
     }
     instance = this;
 
-    gem5::cxxConfigInit();
-
     // register the systemc slave and master port handler
     gem5::ExternalSlave::registerHandler("tlm_slave",
         new SCSlavePortHandler(*this));