Meta: Remove i686 target

Author: https://github.com/supercomputer7
Commit: 55f17fff36
Pull-request: https://github.com/SerenityOS/serenity/pull/15467
Issue: https://github.com/SerenityOS/serenity/issues/15444
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/fuel-pcbox

Toolchain/CMake/LLVMConfig.cmake

@@ -25,7 +25,7 @@ set(LLVM_INSTALL_BINUTILS_SYMLINKS OFF CACHE BOOL "")
 set(CLANG_ENABLE_CLANGD OFF CACHE BOOL "")
 
 set(compiler_flags "-nostdlib -nostdlib++")
-foreach(target i686-pc-serenity;x86_64-pc-serenity;aarch64-pc-serenity)
+foreach(target x86_64-pc-serenity;aarch64-pc-serenity)
     list(APPEND targets "${target}")
 
     set(RUNTIMES_${target}_CMAKE_BUILD_TYPE Release CACHE STRING "")