Fix "[compiler-rt] Allow 3 simultaneous interceptors on Linux"

No need to "error" on unsupported architectures, since we technically
only care where the macro is used. If the macro is undefined, and used,
the compiler will producer an error anyway.

This fixes build on Windows, where none of these macros should be used.

Author: melver

compiler-rt/lib/sanitizer_common/sanitizer_asm.h

@@ -51,8 +51,6 @@
 # define ASM_TAIL_CALL jg
 #elif defined(__riscv)
 # define ASM_TAIL_CALL tail
-#else
-# error ASM_TAIL_CALL: Unimplemented architecture
 #endif
 
 #ifdef __ELF__