SWDEV-324823 - Stop passing -fhip-new-launch-api (#2532)

Stop passing this flag to Clang since it's already the default option

Change-Id: I164f973603dcc2bf02a29939a02af1e0413729b5

[ROCm/hip commit: cb0a5b3b53]

projects/hip/bin/hipcc.pl

@@ -697,7 +697,6 @@ if ($HIP_PLATFORM eq "amd") {
         if ($DEVICE_LIB_PATH ne "$ROCM_PATH/amdgcn/bitcode") {
             $HIPCXXFLAGS .= " --hip-device-lib-path=\"$DEVICE_LIB_PATH\"";
         }
-        $HIPCXXFLAGS .= " -fhip-new-launch-api";
     }
     if (not $isWindows) {
         $HIPLDFLAGS .= " -lgcc_s -lgcc -lpthread -lm -lrt";