Don't eagerly initialize libcurl

This initialization will be done by an `on_load_hook` within `libcurl_jll`.

Author: staticfloat

src/Curl/Curl.jl

@@ -66,7 +66,6 @@ using Base: OS_HANDLE, preserve_handle, unpreserve_handle
 include("utils.jl")
 
 function __init__()
-    @check curl_global_init(CURL_GLOBAL_ALL)
 end
 
 const CURL_VERSION_INFO = unsafe_load(curl_version_info(CURLVERSION_NOW))