FIX: removed unnecessary GCC compiler-specific directive causing a wa…

…rning when used CLANG

src/os/posix/host-readline.c

@@ -731,14 +731,11 @@ static struct termios Term_Attrs; // Initial settings, restored on exit
 
  // If we have leftovers:
  if (term->residue[0]) {
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wstringop-overflow"
  end = (int)LEN_BYTES(term->residue);
  if (end < len) len = end;
  COPY_STR(buf, term->residue, len); // terminated below
  COPY_MEM(term->residue, term->residue+len, end-len); // remove
  term->residue[end-len] = 0;
-#pragma GCC diagnostic pop
  }
  else {
  // Read next few bytes. We don't know how many may be waiting.