cmake: Remove old qmake options.

b.sh

@@ -31,14 +31,9 @@ do
 			;;
 		--release)
 			CMAKE_ARGS="-DCMAKE_BUILD_TYPE=Release ${CMAKE_ARGS}"
-			QMAKE_ARGS="CONFIG+=release ${QMAKE_ARGS}"
 			;;
 		--debug)
 			CMAKE_ARGS="-DCMAKE_BUILD_TYPE=Debug ${CMAKE_ARGS}"
-			QMAKE_ARGS="CONFIG+=debug ${QMAKE_ARGS}"
-			;;
-		--system-ffmpeg)
-			QMAKE_ARGS="CONFIG+=system_ffmpeg ${QMAKE_ARGS}"
 			;;
 		--headless) echo "Headless mode enabled"
 			CMAKE_ARGS="-DHEADLESS=ON ${CMAKE_ARGS}"