core: Remove dlfcn dependency on Windows (#4347)

docs/mdbook/src/platforms/windows/build-msvc-arm64.md

@@ -48,7 +48,6 @@ if (!(Test-Path platform\windows\vendor\vcpkg\vcpkg.exe)) {
 .\platform\windows\vendor\vcpkg\vcpkg.exe install libuv:arm64-windows
 .\platform\windows\vendor\vcpkg\vcpkg.exe install icu:arm64-windows
 .\platform\windows\vendor\vcpkg\vcpkg.exe install glfw3:arm64-windows
-.\platform\windows\vendor\vcpkg\vcpkg.exe install dlfcn-win32:arm64-windows
 .\platform\windows\vendor\vcpkg\vcpkg.exe install zlib:arm64-windows
 .\platform\windows\vendor\vcpkg\vcpkg.exe install egl-registry:arm64-windows
 .\platform\windows\vendor\vcpkg\vcpkg.exe install opengl-registry:arm64-windows

docs/mdbook/src/platforms/windows/build-msys2.md

@@ -14,7 +14,6 @@ pacman -S --needed \
     ${MINGW_PACKAGE_PREFIX}-cmake \
     ${MINGW_PACKAGE_PREFIX}-angleproject \
     ${MINGW_PACKAGE_PREFIX}-curl-winssl \
-    ${MINGW_PACKAGE_PREFIX}-dlfcn \
     ${MINGW_PACKAGE_PREFIX}-glfw \
     ${MINGW_PACKAGE_PREFIX}-icu \
     ${MINGW_PACKAGE_PREFIX}-libjpeg-turbo \

platform/default/src/mbgl/storage/http_file_source.cpp

@@ -15,7 +15,6 @@
 
 #include <curl/curl.h>
 
-#include <dlfcn.h>
 #include <queue>
 #include <cassert>
 #include <cstring>

platform/windows/Get-VendorPackages.ps1

@@ -39,7 +39,7 @@ if(-not (Test-Path ('{0}\vcpkg.exe' -f $vcpkg_temp_dir)))
         ('--overlay-triplets={0}' -f [System.IO.Path]::Combine($PWD.Path, 'vendor', 'vcpkg-custom-triplets')),
         ('--triplet={0}' -f $Triplet),
         '--clean-after-build',
-        'install', 'curl', 'dlfcn-win32', 'glfw3', 'libuv', 'libjpeg-turbo', 'libpng', 'libwebp'
+        'install', 'curl', 'glfw3', 'libuv', 'libjpeg-turbo', 'libpng', 'libwebp'
     ) + $renderer_packages + $(if(${With-ICU}) {@('icu')} else {@()})
 )
 

platform/windows/windows.cmake

@@ -23,13 +23,11 @@ if(MSVC)
     )
 
     find_package(CURL REQUIRED)
-    find_package(dlfcn-win32 REQUIRED)
     find_package(ICU OPTIONAL_COMPONENTS i18n uc)
     find_package(JPEG REQUIRED)
     find_package(libuv REQUIRED)
     find_package(PNG REQUIRED)
     find_package(WebP REQUIRED)
-    find_path(DLFCN_INCLUDE_DIRS dlfcn.h)
     find_path(LIBUV_INCLUDE_DIRS uv.h)
 elseif(DEFINED ENV{MSYSTEM})
     set(MSYS 1)
@@ -187,7 +185,6 @@ target_include_directories(
     PRIVATE
         ${PROJECT_SOURCE_DIR}/platform/windows/include
         ${CURL_INCLUDE_DIRS}
-        ${DLFCN_INCLUDE_DIRS}
         ${JPEG_INCLUDE_DIRS}
         ${LIBUV_INCLUDE_DIRS}
         ${WEBP_INCLUDE_DIRS}
@@ -234,7 +231,6 @@ if(MSVC)
         mbgl-core
         PRIVATE
             ${CURL_LIBRARIES}
-            dlfcn-win32::dl
     )
 elseif(MSYS)
     target_link_libraries(