doc: doxygen: remove non-existing INPUT entry

sys/arch_interface.h does no longer exist.

Signed-off-by: Gerard Marull-Paretas <[email protected]>

Author: gmarull

doc/zephyr.doxyfile.in

@@ -925,7 +925,6 @@ INPUT                  = @ZEPHYR_BASE@/doc/_doxygen/mainpage.md \
                          @ZEPHYR_BASE@/doc/_doxygen/groups.dox \
                          @ZEPHYR_BASE@/kernel/include/kernel_arch_interface.h \
                          @ZEPHYR_BASE@/include/zephyr/arch/cache.h \
-                         @ZEPHYR_BASE@/include/zephyr/sys/arch_interface.h \
                          @ZEPHYR_BASE@/include/zephyr/sys/atomic.h \
                          @ZEPHYR_BASE@/include/ \
                          @ZEPHYR_BASE@/lib/libc/minimal/include/ \