chore(agent): remove obsolete code

[hahuja2]

No description provided.

[newrelic-php-agent-bot]

Test Suite	Status	Result
Multiverse	❌	5/8 passing
SOAK	✅	85/85 passing

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 59.25926% with 11 lines in your changes missing coverage. Please review.

Project coverage is 78.13%. Comparing base (546c0e5) to head (c60eafe).

Files with missing lines	Patch %	Lines
agent/fw_zend3.c	0.00%	5 Missing ⚠️
agent/php_call.c	42.85%	4 Missing ⚠️
agent/lib_zend_http.c	0.00%	1 Missing ⚠️
agent/php_agent.c	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1098      +/-   ##
==========================================
+ Coverage   77.20%   78.13%   +0.93%     
==========================================
  Files         199      193       -6     
  Lines       28343    27976     -367     
==========================================
- Hits        21882    21859      -23     
+ Misses       6461     6117     -344     

Flag	Coverage Δ
agent-for-php-7.2	78.37% <48.14%> (+0.97%)	⬆️
agent-for-php-7.3	78.39% <59.25%> (+0.97%)	⬆️
agent-for-php-7.4	78.25% <59.25%> (+0.97%)	⬆️
agent-for-php-8.0	77.46% <52.38%> (+0.96%)	⬆️
agent-for-php-8.1	77.77% <52.38%> (+0.96%)	⬆️
agent-for-php-8.2	77.38% <52.38%> (+0.95%)	⬆️
agent-for-php-8.3	77.38% <52.38%> (+0.95%)	⬆️
agent-for-php-8.4	77.40% <52.38%> (+0.95%)	⬆️

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