chore(graphql): subscription rtf unused filter types cleanup

[sundersc]

Cleanup the type generation added for subscriptions RTF.

[codecov-commenter]

Codecov Report

Merging #750 (f71bfce) into main (6a7b9f3) will increase coverage by 0.43%.
The diff coverage is 91.30%.

@@            Coverage Diff             @@
##             main     #750      +/-   ##
==========================================
+ Coverage   63.14%   63.58%   +0.43%     
==========================================
  Files         278      279       +1     
  Lines       18125    18212      +87     
  Branches     4375     4401      +26     
==========================================
+ Hits        11445    11580     +135     
+ Misses       6093     6044      -49     
- Partials      587      588       +1     

Impacted Files	Coverage Δ
...on-transformer/src/graphql-function-transformer.ts	93.54% <ø> (ø)
...l-http-transformer/src/graphql-http-transformer.ts	96.21% <ø> (ø)
...transformer/src/graphql-predictions-transformer.ts	97.80% <ø> (ø)
...-transformer/src/graphql-belongs-to-transformer.ts	97.26% <ø> (ø)
...al-transformer/src/graphql-has-many-transformer.ts	100.00% <ø> (ø)
...nal-transformer/src/graphql-has-one-transformer.ts	98.59% <ø> (ø)
...searchable-transformer/src/cdk/create-cfnOutput.ts	100.00% <ø> (ø)
...graphql-elasticsearch-transformer/src/resources.ts	100.00% <ø> (ø)
...fy-graphql-auth-transformer/src/resolvers/field.ts	71.42% <33.33%> (+2.04%)	⬆️
...l-transformer-core/src/transformation/transform.ts	16.26% <50.00%> (-0.05%)	⬇️
... and 49 more

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[lgtm-com]

This pull request introduces 1 alert when merging a907098 into bbfc243 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

[AaronZyLee]

LGTM. Nit: the unused import can be removed indicated by the bot.