Remove a test that is non-portable (cannot be execute on cross builds, for example)

While it might be nice to have a quick end-to-end sanity test, it's just not
really the right place for it & would require more work to enable lit to
provide a detection flag ("XFAIL: cross" or similar) than the value we get from
having this test. Early on it might've made more sense, but these days we've
got some pretty good coverage across the stack with more targeted tests.

llvm-svn: 164314

clang/test/Driver/hello.c

@@ -1,18 +0,0 @@
-// RUN: %clang -ccc-echo -o %t.exe %s 2> %t.log
-
-// Make sure we used clang.
-// RUN: grep 'clang\(-[0-9.]\+\)\?\(\.[Ee][Xx][Ee]\)\?" -cc1 .*hello.c' %t.log
-
-// RUN: %t.exe > %t.out
-// RUN: grep "I'm a little driver, short and stout." %t.out
-
-// FIXME: We don't have a usable assembler on Windows, so we can't build real
-// apps yet.
-// XFAIL: win32
-
-#include <stdio.h>
-
-int main() {
-  printf("I'm a little driver, short and stout.");
-  return 0;
-}