Handle leftover deprecations

[ajantha-bhat]

Feature Request / Improvement

While working on #13053, I just looked up @deprecated and found still too many places need clean up or update.

Example: MetricsConfig.fromProperties() need to be removed.
org.apache.iceberg.data.GenericAppenderHelper need to be removed?
FlinkSchemaUtil.convert(TableSchema schema) need to be removed.
etc.

Note:
Lookup @deprecated, please go through the java doc before removing or updating. Should not remove/update contents that are meant for 2.0.0 or next version 1.11.0.

Work on the things that doesn't have version mentioned in the javadoc (maybe need javadoc update if it is meant for 2.0.0)

Query engine

None

Willingness to contribute

• I can contribute this improvement/feature independently
• I would be willing to contribute this improvement/feature with guidance from the Iceberg community
• I cannot contribute this improvement/feature at this time

[ajantha-bhat]

This can be a good first issue if anyone wants to contribute. Tag me or @nastra for the review.

[nastra]

GenericAppenderHelper is being handled by #12938

[Bhargavkonidena]

Hi @ajantha-bhat
can I work on this?

[ajantha-bhat]

@Bhargavkonidena
There are already three PRs for part of this task. (#13056, #13072), #12938

Maybe the remaining ones you can tackle.

Please mention what you are working on here. So, it won't overlap with others work.

[CuteChuanChuan]

Hi @ajantha-bhat and @nastra

I submitted a PR #13197 to remove deprecated leftover code inside ORC and MetricsContext.

Could you please take a look when you have a chance? I'd appreciate your feedback.

Thank you.