remove -Werror
see https://bugs.gentoo.org/979178
--- a/game/CMakeLists.txt
+++ b/game/CMakeLists.txt
@@ -302,12 +302,6 @@ if(WIN32)
 	set_target_properties(performous PROPERTIES OUTPUT_NAME "Performous")
 endif()
 
-if(WIN32 AND MSVC)
-#	target_compile_options(performous PUBLIC /WX)
-else()
-	target_compile_options(performous PUBLIC -Werror)
-endif()
-
 # Generate config.hh
 configure_file("${CMAKE_CURRENT_SOURCE_DIR}/config.cmake.hh" "${CMAKE_CURRENT_BINARY_DIR}/config.hh" @ONLY)
 target_include_directories(performous PRIVATE "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}")
--- a/testing/CMakeLists.txt
+++ b/testing/CMakeLists.txt
@@ -74,12 +74,6 @@ if(GTest_FOUND)
 
 	target_include_directories(performous_test PRIVATE ".." "../game" "${Performous_BINARY_DIR}/game")
 
-	if(WIN32 AND MSVC)
-#		target_compile_options(performous_test PUBLIC /WX)
-	else()
-		target_compile_options(performous_test PUBLIC -Werror)
-	endif()
-	
 	find_package(SDL2 REQUIRED)
 	if (TARGET SDL2::SDL2)
 		target_link_libraries(performous_test PRIVATE SDL2::SDL2)