Remove OpenGL test for uint16 support
Remove OpenGL test for uint16 support

16bpp textures don't seem to be widely supported, so remove the test for
now. I think we will need floating point textures before we can support this
in a portable way.

psuriana/Halide,kgnk/Halide,dan-tull/Halide,delcypher/Halide,ayanazmat/Halide,ronen/Halide,damienfir/Halide,lglucin/Halide,psuriana/Halide,kenkuang1213/Halide,jiawen/Halide,ronen/Halide,tdenniston/Halide,kgnk/Halide,dougkwan/Halide,dan-tull/Halide,kgnk/Halide,kenkuang1213/Halide,gchauras/Halide,myrtleTree33/Halide,jiawen/Halide,fengzhyuan/Halide,jiawen/Halide,damienfir/Halide,delcypher/Halide,psuriana/Halide,mcanthony/Halide,ronen/Halide,damienfir/Halide,rodrigob/Halide,lglucin/Halide,mcanthony/Halide,dougkwan/Halide,mcanthony/Halide,lglucin/Halide,rodrigob/Halide,tdenniston/Halide,kenkuang1213/Halide,gchauras/Halide,gchauras/Halide,mcanthony/Halide,tdenniston/Halide,tdenniston/Halide,jiawen/Halide,myrtleTree33/Halide,kenkuang1213/Halide,adasworks/Halide,aam/Halide,rodrigob/Halide,myrtleTree33/Halide,ayanazmat/Halide,fengzhyuan/Halide,rodrigob/Halide,kenkuang1213/Halide,tdenniston/Halide,mcanthony/Halide,mcanthony/Halide,dan-tull/Halide,rodrigob/Halide,adasworks/Halide,fengzhyuan/Halide,adasworks/Halide,psuriana/Halide,fengzhyuan/Halide,dougkwan/Halide,ronen/Halide,fengzhyuan/Halide,jiawen/Halide,ronen/Halide,smxlong/Halide,psuriana/Halide,ronen/Halide,myrtleTree33/Halide,rodrigob/Halide,dougkwan/Halide,gchauras/Halide,fengzhyuan/Halide,ayanazmat/Halide,smxlong/Halide,lglucin/Halide,ayanazmat/Halide,ayanazmat/Halide,jiawen/Halide,aam/Halide,delcypher/Halide,damienfir/Halide,dan-tull/Halide,myrtleTree33/Halide,tdenniston/Halide,smxlong/Halide,aam/Halide,lglucin/Halide,psuriana/Halide,kenkuang1213/Halide,myrtleTree33/Halide,dan-tull/Halide,ayanazmat/Halide,kgnk/Halide,rodrigob/Halide,lglucin/Halide,dougkwan/Halide,dan-tull/Halide,mcanthony/Halide,dan-tull/Halide,dougkwan/Halide,kgnk/Halide,smxlong/Halide,delcypher/Halide,delcypher/Halide,kenkuang1213/Halide,myrtleTree33/Halide,aam/Halide,lglucin/Halide,rodrigob/Halide,fengzhyuan/Halide,jiawen/Halide,kgnk/Halide,adasworks/Halide,dougkwan/Halide,aam/Halide,myrtleTree33/Halide,tdenniston/Halide,damienfir/Halide,ayanazmat/Halide,adasworks/Halide,ayanazmat/Halide,aam/Halide,smxlong/Halide,mcanthony/Halide,adasworks/Halide,fengzhyuan/Halide,gchauras/Halide,ronen/Halide,delcypher/Halide,damienfir/Halide,ronen/Halide,smxlong/Halide,kgnk/Halide,damienfir/Halide,delcypher/Halide,aam/Halide,adasworks/Halide,smxlong/Halide,kenkuang1213/Halide,dougkwan/Halide,gchauras/Halide,psuriana/Halide,tdenniston/Halide,dan-tull/Halide,smxlong/Halide,kgnk/Halide,delcypher/Halide,damienfir/Halide,adasworks/Halide