cmake: remove -Dno-autodocs

this is now the default

Author: andrewrk

CMakeLists.txt

@@ -907,8 +907,6 @@ else()
 endif()
 
 # -Dno-langref is currently hardcoded because building the langref takes too damn long
-# -Dno-autodocs is currently hardcoded because the C backend generates a miscompilation
-#   that prevents it from working.
 # To obtain these two forms of documentation, run zig build against stage3 rather than stage2.
 set(ZIG_BUILD_ARGS
   --zig-lib-dir "${CMAKE_SOURCE_DIR}/lib"
@@ -918,7 +916,6 @@ set(ZIG_BUILD_ARGS
   ${ZIG_STATIC_ARG}
   ${ZIG_NO_LIB_ARG}
   "-Dno-langref"
-  "-Dno-autodocs"
   ${ZIG_SINGLE_THREADED_ARG}
   ${ZIG_PIE_ARG}
   "-Dtarget=${ZIG_TARGET_TRIPLE}"