fix(FitBounds): remove old location on loc change

[ghost]

when a FitBoundsAccessor emits new bounds, remove the old ones from
the map's bounds array

fixes: #1512

[codecov]

Codecov Report

Merging #1710 into master will decrease coverage by 0.02%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #1710      +/-   ##
==========================================
- Coverage   47.25%   47.23%   -0.03%     
==========================================
  Files          41       41              
  Lines        1805     1806       +1     
  Branches      165      166       +1     
==========================================
  Hits          853      853              
- Misses        949      950       +1     
  Partials        3        3

Impacted Files	Coverage Δ
packages/core/directives/fit-bounds.ts	0% <0%> (ø)	⬆️

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