lstrip domain name if wildacrd

[komuw]

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Now,

What(What have you changed?)

• if we have been given a wildcard name, strip wildcard before trying to delete it

Why(Why did you change it?)

• Fixes: Cloudflare TXT record is not removed #134

[codecov]

Codecov Report

Merging #139 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #139      +/-   ##
==========================================
+ Coverage   86.42%   86.44%   +0.01%     
==========================================
  Files          14       14              
  Lines         943      944       +1     
==========================================
+ Hits          815      816       +1     
  Misses        128      128

Impacted Files	Coverage Δ
sewer/dns_providers/cloudflare.py	93.24% <100%> (+0.09%)	⬆️
sewer/__version__.py	100% <100%> (ø)	⬆️