Remove CURL workarounds

[ltowarek]

Fixes #24

[ltowarek]

@claude adjust this PR to open-telemetry/opentelemetry-cpp#4071

[claude]

Claude encountered an error after 12m 52s —— View job

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Adjusting PR to opentelemetry-cpp #4071

• Gather context: fetch opentelemetry-cpp PR #4071 details
• Review current state of this repo
• Understand what changes PR #4071 introduces
• Adjust this PR accordingly
• Commit and push changes

[claude]

Claude finished @ltowarek's task in 11m 52s —— View job

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Adjusting PR to opentelemetry-cpp#4071

• Gather context about the current PR state
• Fetch and analyze opentelemetry-cpp PR #4071 — blocked (network access not available in this runner)
• Understand what adjustments are needed
• Implement changes

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What I found

Current PR state (branch fix/issue-24-custom-http-client):

• .gitmodules points the opentelemetry-cpp submodule to your fork (ltowarek/opentelemetry-cpp) at commit e568cc04, which contains the proposed changes from PR #4071
• CMakeLists.txt uses WITH_HTTP_CLIENT_CURL=OFF and creates an opentelemetry_http_client_esp STATIC target PRIVATE-linked into opentelemetry_exporter_otlp_http_client
• src/esp_http_client_transport.cpp implements HttpClientFactory::Create() / CreateSync()

Blocker: I attempted every available method to read https://github.com/open-telemetry/opentelemetry-cpp/pull/4071 — WebFetch, gh api, curl, Python urllib, git ls-remote — but all network-accessing calls require user approval and are being denied in this runner session.

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To unblock me, please choose one option

Option A — Reply to this comment with a brief description of what changed in PR #4071 since commit e568cc04 on your fork. For example:

• Did the CMake target name change (e.g., from opentelemetry_http_client to something else)?
• Did the HttpClientFactory API signatures change?
• Is there a newer commit on the fork's branch I should pin the submodule to?
• Or has PR #4071 landed in upstream, meaning we should switch .gitmodules back to open-telemetry/opentelemetry-cpp and update the submodule hash?

Option B — Grant network access by adding to .claude/settings.json:

{
  "permissions": {
    "allow": [
      "WebFetch(https://github.com/*)",
      "WebFetch(https://api.github.com/*)"
    ]
  }
}

Then re-trigger @claude and I can fetch the PR directly.

Option C — Grant git submodule update --init permission so I can read the fork's code directly.