Remove export of CPLUS_INCLUDE_PATH in AOCL

[AlexKurek]

Description

There is no /opt/aocl/5.1/aocc/include folder. CPLUS_INCLUDE_PATH is exported in amd-libs.cfg:

export AOCL_ROOT=/opt/aocl/5.1.0/aocc;
export C_INCLUDE_PATH=/opt/aocl/5.1.0/aocc/include:$C_INCLUDE_PATH
export CPLUS_INCLUDE_PATH=/opt/aocl/5.1.0/aocc/include:$CPLUS_INCLUDE_PATH
export LD_LIBRARY_PATH=/opt/aocl/5.1.0/aocc/lib:$LD_LIBRARY_PATH
export LIBRARY_PATH=/opt/aocl/5.1.0/aocc/lib:$LIBRARY_PATH