liblzma: Remove a useless C99ism from sha256.c.

Unsurprisingly it makes no difference in compiled output.
diff --git a/src/liblzma/check/sha256.c b/src/liblzma/check/sha256.c
index 77ff483..a8470d5 100644
--- a/src/liblzma/check/sha256.c
+++ b/src/liblzma/check/sha256.c
@@ -80,7 +80,7 @@
 
 
 static void
-transform(uint32_t state[static 8], const uint32_t data[static 16])
+transform(uint32_t state[8], const uint32_t data[16])
 {
 	uint32_t W[16];
 	uint32_t T[8];