Simplify patch by removing changes for ASCII PGM/PPM support
Simplify patch by removing changes for ASCII PGM/PPM support

kgnk/Halide,jiawen/Halide,ronen/Halide,jiawen/Halide,ronen/Halide,kgnk/Halide,jiawen/Halide,psuriana/Halide,psuriana/Halide,kgnk/Halide,psuriana/Halide,ronen/Halide,kgnk/Halide,psuriana/Halide,psuriana/Halide,kgnk/Halide,kgnk/Halide,ronen/Halide,jiawen/Halide,ronen/Halide,jiawen/Halide,ronen/Halide,kgnk/Halide,ronen/Halide,kgnk/Halide,psuriana/Halide,ronen/Halide,jiawen/Halide,psuriana/Halide,jiawen/Halide