remove frontend that required parmys, odin ii or mosaic

Author: ayan20985

CMakeLists.txt

@@ -59,10 +59,6 @@ option(WITH_PARMYS "Enable Yosys as elaborator and parmys-plugin as partial mapp
 option(WITH_MOSAIC "Enable mosaic yosys plugin as an alternative synthesis frontend" ON)
 option(SLANG_SYSTEMVERILOG "Enable building and installing Yosys-Slang plugin for parsing SystemVerilog" ON)
 
-if(NOT ${WITH_PARMYS} AND NOT ${WITH_MOSAIC} AND NOT ${WITH_ODIN})
-    message(FATAL_ERROR "At least one synthesis frontend must be enabled "
-                        "(WITH_PARMYS, WITH_MOSAIC, or WITH_ODIN)")
-endif()
 
 if(${WITH_PARMYS} OR ${WITH_MOSAIC})
     set(WITH_YOSYS ON)