config/nios2: gdb is no longer supported on nios2

This target is going away soon; gdb support is already gone.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

configs/nios2-zephyr-elf.config

@@ -8,3 +8,4 @@ CT_MULTILIB=y
 CT_CC_GCC_CONFIG_TLS=n
 CT_CC_GCC_EXTRA_CONFIG_ARRAY="--enable-obsolete"
 CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY="--enable-obsolete"
+CT_DEBUG_GDB=n