testimage/oeqa: Drop testimage_dump_host functionality

The intent behind these functions was to dump the system state when issues occured
but it has never really worked as we'd planned. Regular monitoring as the build
runs has largely replaced this as that allows a trend to be seen rather than a spot
value which was never really useful. The code is bitrotting and not functioning
correctly so drop it.

[YOCTO #13872]

RP: Reword commit message
(From OE-Core rev: 8d1bc34cffdd9f054e51db4e880747c79bf834fe)

Signed-off-by: Thomas Roos <throos@amazon.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit dea37ba49a236029da73d5cfbfc069bffc38b508)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/classes-recipe/testimage.bbclass

@@ -115,18 +115,6 @@ testimage_dump_target () {
     find /var/log/ -type f 2>/dev/null -exec echo "====================" \; -exec echo {} \; -exec echo "====================" \; -exec cat {} \; -exec echo "" \;
 }
 
-testimage_dump_host () {
-    top -bn1
-    iostat -x -z -N -d -p ALL 20 2
-    ps -ef
-    free
-    df
-    memstat
-    dmesg
-    ip -s link
-    netstat -an
-}
-
 testimage_dump_monitor () {
     query-status
     query-block
@@ -339,19 +327,13 @@ def testimage_main(d):
     # runtime use network for download projects for build
     export_proxies(d)
 
-    # we need the host dumper in test context
-    host_dumper = OERuntimeTestContextExecutor.getHostDumper(
-        d.getVar("testimage_dump_host"),
-        d.getVar("TESTIMAGE_DUMP_DIR"))
-
     # the robot dance
     target = OERuntimeTestContextExecutor.getTarget(
         d.getVar("TEST_TARGET"), logger, d.getVar("TEST_TARGET_IP"),
         d.getVar("TEST_SERVER_IP"), **target_kwargs)
 
     # test context
-    tc = OERuntimeTestContext(td, logger, target, host_dumper,
-                              image_packages, extract_dir)
+    tc = OERuntimeTestContext(td, logger, target, image_packages, extract_dir)
 
     # Load tests before starting the target
     test_paths = get_runtime_paths(d)