cmake: remove configuration variables

CMAKE_BUILD_TYPE is meant for single-config build tools (e.g., make and
ninja) while CMAKE_CONFIGURATION_TYPES is meant for multi-config build
tools (e.g., Xcode and Visual Studio). They should not be mixed or
manually set.

CMakeLists.txt

@@ -61,7 +61,6 @@ message(STATUS "BOOST_IGNORE_SYSTEM_PATHS defaults to ${BOOST_IGNORE_SYSTEM_PATH
 option(BOOST_IGNORE_SYSTEM_PATHS "Ignore boost system paths for local boost ins	tallation" $BOOST_IGNORE_SYSTEM_PATHS_DEFAULT)
 
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
-set(CMAKE_CONFIGURATION_TYPES "Debug;Release")
 enable_testing()
 
 # Check if we're on FreeBSD so we can exclude the local miniupnpc (it should be installed from ports instead)

external/miniupnpc/CMakeLists.txt

@@ -4,17 +4,6 @@ project (miniupnpc C)
 set (MINIUPNPC_VERSION 1.9)
 set (MINIUPNPC_API_VERSION 10)
 
-if (NOT CMAKE_BUILD_TYPE)
-  if (WIN32)
-    set (DEFAULT_BUILD_TYPE MinSizeRel)
-  else ()
-    set (DEFAULT_BUILD_TYPE RelWithDebInfo)
-  endif()
-    set (CMAKE_BUILD_TYPE ${DEFAULT_BUILD_TYPE} CACHE STRING
-        "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel."
-        FORCE)
-endif()
-
 option (UPNPC_BUILD_STATIC "Build static library" TRUE)
 option (UPNPC_BUILD_SHARED "Build shared library" TRUE)
 if (NOT WIN32)