fix: remove float-abi

Author: jclab-joseph

targets/uefi-amd64.json

@@ -13,7 +13,6 @@
     "-Werror",
     "-fshort-enums",
     "-fomit-frame-pointer",
-    "-mfloat-abi=soft",
     "-fno-exceptions", "-fno-unwind-tables", "-fno-asynchronous-unwind-tables",
     "-ffunction-sections", "-fdata-sections",
     "-ffreestanding",