vboot/ui: Remove diagnostics menu and related tests

This CL is a part of centralizing ui codes. The removed screens and unit
tests will be added in depthcharge.

Remove diagnostics menu, diagnostics storage and memory checking screens.

Remove unit tests for above screens and menu.

TEST=export CC=x86_64-pc-linux-gnu-clang DEBUG=1 DETACHABLE=0; \
     make -j test_setup && make -j runtests
TEST=export CC=x86_64-pc-linux-gnu-clang DEBUG=1 DETACHABLE=1; \
     make -j test_setup && make -j runtests

Cq-Depend: chromium:3138687
Signed-off-by: edisonhello <edisonhello@google.com>
Change-Id: I5eb1bee6a5f1aedb77298acbddab20156c1c086e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3139537
Reviewed-by: Yu-Ping Wu <yupingso@chromium.org>
9 files changed