Remove deprecated UsersLookupByEmailResponse parent class (deprecated in v1.1)

[seratch]

This pull request removes a class kept for backward-compatibility since v1.1.0. I'm sure this is safe enough as the class has been marked as deprecated in v1.1 plus it's not a runtime error but a compilation failure.

Related to #549 #486

Category (place an x in each of the [ ])

• bolt (Bolt for Java)
• bolt-{sub modules} (Bolt for Java - optional modules)
• slack-api-client (Slack API Clients)
• slack-api-model (Slack API Data Models)
• slack-api-*-kotlin-extension (Kotlin Extensions for Slack API Clients)
• slack-app-backend (The primitive layer of Bolt for Java)

Requirements

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you are agreeing to those rules.

[codecov]

Codecov Report

Merging #551 into main will increase coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #551      +/-   ##
============================================
+ Coverage     83.75%   83.81%   +0.05%     
  Complexity     2694     2694              
============================================
  Files           297      296       -1     
  Lines          7191     7190       -1     
  Branches        611      611              
============================================
+ Hits           6023     6026       +3     
+ Misses          803      799       -4     
  Partials        365      365              

Impacted Files	Coverage Δ	Complexity Δ
...pi/methods/metrics/impl/RedisMetricsDatastore.java	89.50% <0.00%> (+2.46%)	38.00% <0.00%> (+1.00%)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c5804ce...1300d80. Read the comment docs.

[seratch]

We will merge this after v1.1.4 release.

[mwbrooks]

@seratch I noticed that this is part of the 1.2.0 milestone but removing the deprecated class will cause a breaking change (compile error). Following semver rules, should this be a major (2.0.0 release)?

[seratch]

Following semver rules, should this be a major (2.0.0 release)?

I think this is a very minor breaking change but, yes, strictly speaking, you're right. I agree we should follow the rule.

Let me close this PR and will do this in v2.0.