Only unload if loaded

[ludeeus]

Closes #1244

[codecov]

Codecov Report

Merging #1245 into master will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1245      +/-   ##
==========================================
- Coverage   57.51%   57.48%   -0.03%     
==========================================
  Files          38       38              
  Lines        2210     2211       +1     
==========================================
  Hits         1271     1271              
- Misses        939      940       +1     

Impacted Files	Coverage Δ
custom_components/hacs/__init__.py	17.12% <0.00%> (-0.12%)	⬇️

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