Cleanup dead and obsolete code. Remove software renderer and unused modules: [FILES_OLD.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/FILES_OLD.PAS) [D3D_RENDER.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/D3D_RENDER.PAS) [D3D_PRENDER.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/D3D_PRENDER.PAS) [OLD_OGL_PRENDER.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/OLD_OGL_PRENDER.PAS) [TDFX_PRENDER.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/TDFX_PRENDER.PAS) [TDFX_OGL_PRENDER.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/TDFX_OGL_PRENDER.PAS) [OPENGL.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/OPENGL.PAS) [COG_UTILS.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/COG_UTILS.PAS) [UNIT1.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/UNIT1.PAS) [U_MCOG.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/U_MCOG.PAS) [FILES_OLD.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/FILES_OLD.PAS) [GL3DFX.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/GL3DFX.PAS) [U_TPLEDIT.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/U_TPLEDIT.PAS) [JED_OLE.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/JED_OLE.PAS) [JLH_JLL.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/JLH_JLL.PAS) [THREEDVIEW.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/THREEDVIEW.PAS) [TMP_LOAD3DO.PAS](https://github.com/smlu/SED/blob/1fb399b3b29c000df7af761f2dc23c3f6ad2e95e/src/TMP_LOAD3DO.PAS)
Cleanup dead and obsolete code.
Remove software renderer and unused modules:
FILES_OLD.PAS
D3D_RENDER.PAS
D3D_PRENDER.PAS
OLD_OGL_PRENDER.PAS
TDFX_PRENDER.PAS
TDFX_OGL_PRENDER.PAS
OPENGL.PAS
COG_UTILS.PAS
UNIT1.PAS
U_MCOG.PAS
FILES_OLD.PAS
GL3DFX.PAS
U_TPLEDIT.PAS
JED_OLE.PAS
JLH_JLL.PAS
THREEDVIEW.PAS
TMP_LOAD3DO.PAS