HADOOP-17055. Remove residual code of Ozone

[jiwq]

I found some residual code of ozone in hadoop project, so let's remove it.

[hadoop-yetus]

(!) A patch to the testing environment has been detected.
Re-executing against the patched versions to perform further tests.
The console is at https://builds.apache.org/job/hadoop-multibranch/job/PR-2039/1/console in case of problems.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 8s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+0 🆗	shelldocs	0m 0s	Shelldocs was not available.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s	The patch appears to include 1 new or modified test files.
		_ trunk Compile Tests _
+0 🆗	mvndep	1m 15s	Maven dependency ordering for branch
+1 💚	mvninstall	22m 6s	trunk passed
+1 💚	mvnsite	17m 50s	trunk passed
+1 💚	shadedclient	15m 34s	branch has no errors when building and testing our client artifacts.
		_ Patch Compile Tests _
+0 🆗	mvndep	0m 28s	Maven dependency ordering for patch
+1 💚	mvninstall	23m 13s	the patch passed
+1 💚	hadolint	0m 3s	There were no new hadolint issues.
+1 💚	mvnsite	18m 1s	the patch passed
+1 💚	shellcheck	0m 6s	The patch generated 0 new + 20 unchanged - 1 fixed = 20 total (was 21)
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	shadedclient	15m 19s	patch has no errors when building and testing our client artifacts.
		_ Other Tests _
+1 💚	unit	19m 49s	root in the patch passed.
+1 💚	asflicense	0m 52s	The patch does not generate ASF License warnings.
		137m 48s

Subsystem	Report/Notes
Docker	ClientAPI=1.40 ServerAPI=1.40 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-2039/1/artifact/out/Dockerfile
GITHUB PR	#2039
Optional Tests	dupname asflicense shellcheck shelldocs hadolint mvnsite unit shadedclient
uname	Linux ee6a48deaaf1 4.15.0-101-generic #102-Ubuntu SMP Mon May 11 10:07:26 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/hadoop.sh
git revision	trunk / a838d87
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-2039/1/testReport/
Max. process+thread count	349 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs . U: .
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-2039/1/console
versions	git=2.17.1 maven=3.6.0 shellcheck=0.4.6 hadolint=1.11.1-0-g0e692dd
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[aajisaka]

+1, thank you @jiwq

[jiwq]

Thanks @aajisaka reviewing.