Remove duplicated BLAS rewriting code

[ricardoV94]

Accidentally introduced in c655b02

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📚 Documentation preview 📚: https://pytensor--1164.org.readthedocs.build/en/1164/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.27%. Comparing base (a0fe30d) to head (c1e4bb0).
Report is 174 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1164      +/-   ##
==========================================
+ Coverage   82.11%   82.27%   +0.16%     
==========================================
  Files         186      186              
  Lines       48201    48023     -178     
  Branches     8679     8630      -49     
==========================================
- Hits        39579    39513      -66     
+ Misses       6447     6347     -100     
+ Partials     2175     2163      -12     

Files with missing lines	Coverage Δ
pytensor/tensor/blas.py	75.60% <100.00%> (+8.23%)	⬆️

... and 1 file with indirect coverage changes

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