Remove unused service annotations

[bjee19]

Remove unused service annotations. This field on NginxProxy and set through Helm is never used, instead service annotations are set through annotations on the Gateway object.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.65%. Comparing base (dca6b4b) to head (9e799be).

Additional details and impacted files

@@                       Coverage Diff                        @@
##           change/control-data-plane-split    #3362   +/-   ##
================================================================
  Coverage                            86.65%   86.65%           
================================================================
  Files                                  129      129           
  Lines                                14855    14855           
  Branches                                62       62           
================================================================
+ Hits                                 12872    12873    +1     
+ Misses                                1834     1833    -1     
  Partials                               149      149           

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