[tests] Remove prehistoric umalloc() test code

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/tests/umalloc_test.c

@@ -1,25 +0,0 @@
-#include <stdio.h>
-#include <ipxe/umalloc.h>
-#include <ipxe/io.h>
-
-void umalloc_test ( void ) {
-	struct memory_map memmap;
-	void *bob;
-	void *fred;
-
-	printf ( "Before allocation:\n" );
-	get_memmap ( &memmap );
-
-	bob = umalloc ( 1234 );
-	bob = urealloc ( bob, 12345 );
-	fred = umalloc ( 999 );
-
-	printf ( "After allocation:\n" );
-	get_memmap ( &memmap );
-
-	ufree ( bob );
-	ufree ( fred );
-
-	printf ( "After freeing:\n" );
-	get_memmap ( &memmap );
-}