remove bad compiler flags

CMakeLists.txt

@@ -51,12 +51,12 @@ target_compile_options(
 		$<$<OR:$<CXX_COMPILER_ID:GNU>,$<CXX_COMPILER_ID:Clang>>:
 			-W -Wall -Wextra -Werror -Wno-psabi
 			$<$<CONFIG:Debug>:-g>
-			$<$<NOT:$<CONFIG:Debug>>:-O3 -flto>
+			$<$<NOT:$<CONFIG:Debug>>:-O3>
 		>
 		$<$<CXX_COMPILER_ID:MSVC>:
-			/W3 /WX /permissive- /utf-8 /bigobj
+			/W3 /WX /permissive- /utf-8
 			$<$<CONFIG:Debug>:/Od>
-			$<$<NOT:$<CONFIG:Debug>>:/Ot /GL /LTCG>
+			$<$<NOT:$<CONFIG:Debug>>:/Ot>
 		>
 )