[fusl] Remove code for unsupported architectures

fusl/arch/powerpc/bits/fenv.h

Index: fusl/arch/powerpc/bits/fenv.h
diff --git a/fusl/arch/powerpc/bits/fenv.h b/fusl/arch/powerpc/bits/fenv.h
deleted file mode 100644
index 326f4576e99ba5277d3a0bf7dfa284c1b4ac639b..0000000000000000000000000000000000000000
--- a/fusl/arch/powerpc/bits/fenv.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#define FE_TONEAREST 0
-#define FE_TOWARDZERO 1
-#define FE_UPWARD 2
-#define FE_DOWNWARD 3
-
-#define FE_INEXACT 0x02000000
-#define FE_DIVBYZERO 0x04000000
-#define FE_UNDERFLOW 0x08000000
-#define FE_OVERFLOW 0x10000000
-#define FE_INVALID 0x20000000
-
-#define FE_ALL_EXCEPT 0x3e000000
-
-#ifdef _GNU_SOURCE
-#define FE_INVALID_SNAN 0x01000000
-#define FE_INVALID_ISI 0x00800000
-#define FE_INVALID_IDI 0x00400000
-#define FE_INVALID_ZDZ 0x00200000
-#define FE_INVALID_IMZ 0x00100000
-#define FE_INVALID_COMPARE 0x00080000
-#define FE_INVALID_SOFTWARE 0x00000400
-#define FE_INVALID_SQRT 0x00000200
-#define FE_INVALID_INTEGER_CONVERSION 0x00000100
-
-#define FE_ALL_INVALID 0x01f80700
-#endif
-
-typedef unsigned fexcept_t;
-typedef double fenv_t;
-
-#define FE_DFL_ENV ((const fenv_t*)-1)