Revert "headers: fix missing mode_t"

I commited a patch file *headdesk*
This reverts commit 378fcccc0a.

libssh/patches/002-musl_mode_t.patch

@@ -1,10 +0,0 @@
---- a/include/libssh/libssh.h
-+++ b/include/libssh/libssh.h
-@@ -58,6 +58,7 @@
- #else /* _MSC_VER */
-   #include <unistd.h>
-   #include <inttypes.h>
-+  #include <sys/types.h>
- #endif /* _MSC_VER */
- 
- #ifdef _WIN32