HADOOP-19766: ABFS. Update doc for FNS-DFS removal

[manika137]

Description of PR

JIRA: https://issues.apache.org/jira/browse/HADOOP-19766
Updating doc for the recent FNS-DFS deprecation

How was this patch tested?

No production code change

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 45s		Docker mode activated.
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+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+0 🆗	markdownlint	0m 0s		markdownlint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	mvninstall	27m 29s		trunk passed
+1 💚	mvnsite	0m 39s		trunk passed
+1 💚	shadedclient	43m 32s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 20s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 21s		the patch passed
+1 💚	shadedclient	15m 1s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 22s		The patch does not generate ASF License warnings.
		61m 50s

Subsystem	Report/Notes
Docker	ClientAPI=1.52 ServerAPI=1.52 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8205/1/artifact/out/Dockerfile
GITHUB PR	#8205
JIRA Issue	HADOOP-19766
Optional Tests	dupname asflicense mvnsite codespell detsecrets markdownlint
uname	Linux f75db8b8477c 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 8c6f57b
Max. process+thread count	641 (vs. ulimit of 5500)
modules	C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8205/1/console
versions	git=2.25.1 maven=3.9.11
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[anujmodi2021]

One minor comment rest looks good

[anujmodi2021]

Instead of deprecated, we should say removed

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 46s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+0 🆗	markdownlint	0m 0s		markdownlint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	mvninstall	28m 37s		trunk passed
+1 💚	mvnsite	0m 38s		trunk passed
+1 💚	shadedclient	45m 19s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 20s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 21s		the patch passed
+1 💚	shadedclient	15m 29s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 20s		The patch does not generate ASF License warnings.
		63m 51s

Subsystem	Report/Notes
Docker	ClientAPI=1.53 ServerAPI=1.53 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8205/2/artifact/out/Dockerfile
GITHUB PR	#8205
JIRA Issue	HADOOP-19766
Optional Tests	dupname asflicense mvnsite codespell detsecrets markdownlint
uname	Linux 3f489ae2ea97 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 8c13000
Max. process+thread count	615 (vs. ulimit of 5500)
modules	C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8205/2/console
versions	git=2.25.1 maven=3.9.11
Powered by	Apache Yetus 0.14.1 https://yetus.apache.org

This message was automatically generated.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 44s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+0 🆗	markdownlint	0m 0s		markdownlint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	mvninstall	28m 21s		trunk passed
+1 💚	mvnsite	0m 35s		trunk passed
+1 💚	shadedclient	44m 54s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 20s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 22s		the patch passed
+1 💚	shadedclient	15m 28s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 19s		The patch does not generate ASF License warnings.
		63m 22s

Subsystem	Report/Notes
Docker	ClientAPI=1.53 ServerAPI=1.53 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8205/3/artifact/out/Dockerfile
GITHUB PR	#8205
JIRA Issue	HADOOP-19766
Optional Tests	dupname asflicense mvnsite codespell detsecrets markdownlint
uname	Linux 4caaa6a7b53a 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 8c13000
Max. process+thread count	693 (vs. ulimit of 5500)
modules	C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8205/3/console
versions	git=2.25.1 maven=3.9.11
Powered by	Apache Yetus 0.14.1 https://yetus.apache.org

This message was automatically generated.