[ARM] Fix after #153394 (#153561)

This removes two double definitions.

Author: jplehr

llvm/include/llvm/IR/RuntimeLibcalls.td

@@ -1482,11 +1482,6 @@ def __aeabi_h2f : RuntimeLibcallImpl<FPEXT_F16_F32>; // CallingConv::ARM_AAPCS
 def __gnu_f2h_ieee : RuntimeLibcallImpl<FPROUND_F32_F16>;
 def __gnu_h2f_ieee : RuntimeLibcallImpl<FPEXT_F16_F32>;
 
-def GNUEABIHalfConvertCalls :
-  LibcallImpls<(add __gnu_f2h_ieee, __gnu_h2f_ieee),
-    RuntimeLibcallPredicate<[{!TT.isOSBinFormatMachO() &&
-                              !TT.isTargetAEABI()}]>>;
-
 // In EABI, these functions have an __aeabi_ prefix, but in GNUEABI
 // they have a __gnu_ prefix (which is the default).
 def EABIHalfConvertCalls : LibcallImpls<(add __aeabi_f2h, __aeabi_h2f),
@@ -1509,13 +1504,6 @@ def GNUEABIHalfConvertCalls :
   let CallingConv = ARMHalfConvertLibcallCallingConv;
 }
 
-// In EABI, these functions have an __aeabi_ prefix, but in GNUEABI
-// they have a __gnu_ prefix (which is the default).
-def EABIHalfConvertCalls : LibcallImpls<(add __aeabi_f2h, __aeabi_h2f),
-                                        isTargetAEABIAndAAPCS_ABI> {
-  let CallingConv = ARM_AAPCS;
-}
-
 def WindowARMDivRemCalls : LibcallImpls<
   (add __rt_sdiv, __rt_sdiv64, __rt_udiv, __rt_udiv64),
   isOSWindows> {