CI: Drop some jobs we didn't really utilize

- We have added more TODO/etc comments since this task was created and
  never focused on removing them.
- The output of sloccount isn't preserved or looked at, and if desired
  should be in the release stats pages instead somehow.
- The results of cppcheck aren't investigated and require modeling work
  to be useful to start with.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

tools/docker/Dockerfile

@@ -43,7 +43,6 @@ RUN apt-get update && apt-get install -y \
 	clang-16 \
 	coreutils \
 	cpio \
-	cppcheck \
 	curl \
 	device-tree-compiler \
 	dosfstools \
@@ -105,7 +104,6 @@ RUN apt-get update && apt-get install -y \
 	python3-virtualenv \
 	rpm2cpio \
 	sbsigntool \
-	sloccount \
 	socat \
 	softhsm2 \
 	sparse \