Remove nonsense CMake for this case.

vendor/CPR/cpr/CMakeLists.txt

@@ -1,32 +0,0 @@
-cmake_minimum_required(VERSION 3.7)
-
-add_library(cpr
-    auth.cpp
-    bearer.cpp
-    cookies.cpp
-    cprtypes.cpp
-    curl_container.cpp
-    curlholder.cpp
-    error.cpp
-    multipart.cpp
-    parameters.cpp
-    payload.cpp
-    proxies.cpp
-    session.cpp
-    timeout.cpp
-    unix_socket.cpp
-    util.cpp
-    response.cpp
-    )
-
-add_library(cpr::cpr ALIAS cpr)
-
-target_link_libraries(cpr PUBLIC CURL::libcurl) # todo should be private, but first dependencys in ssl_options need to be removed
-
-# Set version for shared libraries.
-set_target_properties(cpr
-     PROPERTIES
-     VERSION ${${PROJECT_NAME}_VERSION}
-     SOVERSION ${${PROJECT_NAME}_VERSION_MAJOR})
-
-install(TARGETS cpr)