Remove some defines

Author: jakobbotsch

src/coreclr/pal/inc/rt/ntimage.h

@@ -1015,17 +1015,6 @@ typedef IMAGE_RELOCATION UNALIGNED *PIMAGE_RELOCATION;
 #define IMAGE_REL_IA64_GPREL32          0x001C
 #define IMAGE_REL_IA64_ADDEND           0x001F
 
-//
-// LOONGARCH64 relocation types
-//
-#define IMAGE_REL_LOONGARCH64_PC        0x0003
-#define IMAGE_REL_LOONGARCH64_JIR       0x0004
-
-//
-// RISCV64 relocation types
-//
-#define IMAGE_REL_RISCV64_PC            0x0003
-
 //
 // CEF relocation types.
 //