docs: raw_call function cleaning

[challet]

What I did

Changing a part of the doc about the raw_call function

How I did it

• Removed a line about "a duplicated contract", which has nothing to do with the raw_call function
• Tried to re-arrange the paragraph

How to verify it

Commit message

docs: raw_call function cleaning

Description for the changelog

Cleaning a line from the raw_call function documentation

Cute Animal Picture

[codecov-commenter]

Codecov Report

Merging #2978 (0f64f4f) into master (dbcc9c7) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2978      +/-   ##
==========================================
- Coverage   88.16%   88.09%   -0.07%     
==========================================
  Files          97       97              
  Lines       10820    10852      +32     
  Branches     2569     2574       +5     
==========================================
+ Hits         9539     9560      +21     
- Misses        823      832       +9     
- Partials      458      460       +2     

Impacted Files	Coverage Δ
vyper/builtin_functions/functions.py	90.25% <0.00%> (-0.72%)	⬇️
vyper/codegen/ir_node.py	91.69% <0.00%> (-0.70%)	⬇️
vyper/codegen/core.py	84.90% <0.00%> (ø)
vyper/ir/optimizer.py	95.03% <0.00%> (ø)
vyper/utils.py	90.00% <0.00%> (+0.16%)	⬆️
vyper/ir/compile_ir.py	93.70% <0.00%> (+0.22%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us.