HBASE-28979 Remove dead code: MemStore upsert

[junegunn]

Since HBASE-24602, we no longer perform MemStore upsert for increment and append operations, and we can remove the dead code.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 49s		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.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	hbaseanti	0m 0s		Patch does not have any anti-patterns.
			_ master Compile Tests _
+1 💚	mvninstall	3m 58s		master passed
+1 💚	compile	3m 57s		master passed
+1 💚	checkstyle	0m 45s		master passed
+1 💚	spotbugs	2m 15s		master passed
+1 💚	spotless	1m 0s		branch has no errors when running spotless:check.
			_ Patch Compile Tests _
+1 💚	mvninstall	3m 40s		the patch passed
+1 💚	compile	3m 37s		the patch passed
+1 💚	javac	3m 37s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 44s		the patch passed
+1 💚	spotbugs	2m 6s		the patch passed
+1 💚	hadoopcheck	13m 19s		Patch does not cause any errors with Hadoop 3.3.6 3.4.0.
+1 💚	spotless	0m 56s		patch has no errors when running spotless:check.
			_ Other Tests _
+1 💚	asflicense	0m 12s		The patch does not generate ASF License warnings.
		46m 23s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6477/2/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#6477
Optional Tests	dupname asflicense javac spotbugs checkstyle codespell detsecrets compile hadoopcheck hbaseanti spotless
uname	Linux dba9713f9bf1 5.4.0-195-generic #215-Ubuntu SMP Fri Aug 2 18:28:05 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 087b127
Default Java	Eclipse Adoptium-17.0.11+9
Max. process+thread count	83 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6477/2/console
versions	git=2.34.1 maven=3.9.8 spotbugs=4.7.3
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 40s		Docker mode activated.
-0 ⚠️	yetus	0m 3s		Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --author-ignore-list --blanks-eol-ignore-file --blanks-tabs-ignore-file --quick-hadoopcheck
			_ Prechecks _
			_ master Compile Tests _
+1 💚	mvninstall	3m 7s		master passed
+1 💚	compile	0m 58s		master passed
+1 💚	javadoc	0m 32s		master passed
+1 💚	shadedjars	5m 20s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	2m 57s		the patch passed
+1 💚	compile	0m 57s		the patch passed
+1 💚	javac	0m 57s		the patch passed
+1 💚	javadoc	0m 29s		the patch passed
+1 💚	shadedjars	5m 16s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	229m 13s		hbase-server in the patch passed.
		254m 16s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6477/2/artifact/yetus-jdk17-hadoop3-check/output/Dockerfile
GITHUB PR	#6477
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux 82a104de569f 5.4.0-195-generic #215-Ubuntu SMP Fri Aug 2 18:28:05 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 087b127
Default Java	Eclipse Adoptium-17.0.11+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6477/2/testReport/
Max. process+thread count	4572 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6477/2/console
versions	git=2.34.1 maven=3.9.8
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.