Remove dead code

[svenklemm]

Remove noop ternary operator in cagg_rebuild_view_definition. We
return if finalized is true on line 2475 so the NIL would never
be reached in the ternary operator. Found by coverity.

[codecov]

Codecov Report

Merging #4364 (913833e) into main (8c5c7bb) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #4364      +/-   ##
==========================================
- Coverage   90.81%   90.80%   -0.02%     
==========================================
  Files         217      217              
  Lines       40249    40249              
==========================================
- Hits        36553    36548       -5     
- Misses       3696     3701       +5     

Impacted Files	Coverage Δ
tsl/src/continuous_aggs/create.c	88.63% <0.00%> (ø)
src/loader/bgw_message_queue.c	85.52% <0.00%> (-2.64%)	⬇️
tsl/src/nodes/data_node_dispatch.c	97.10% <0.00%> (-0.25%)	⬇️

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