Remove local variable from simple.rs test case

This removes the "y0" variable from simple.rs:main.  This variable
isn't needed by the test case, and it uses a form of initialization
that was added in rust 1.17.  Removing this makes it simpler to run
the gdb.rust tests against older versions of rustc.

gdb/testsuite/ChangeLog
2020-04-01  Tom Tromey  <tromey@adacore.com>

	* gdb.rust/simple.rs (main): Remove "y0".

1 files changed, 0 insertions, 1 deletions

diff --git a/gdb/testsuite/gdb.rust/simple.rs b/gdb/testsuite/gdb.rust/simple.rs
index 36448ec..f44e4af 100644
--- a/gdb/testsuite/gdb.rust/simple.rs
+++ b/gdb/testsuite/gdb.rust/simple.rs
@@ -144,7 +144,6 @@ fn main () {
 
     let field1 = 77;
     let field2 = 88;
-    let y0 = HiBob { field1, field2 };
 
     let univariant = Univariant::Foo {a : 1};
     let univariant_anon = UnivariantAnon::Foo(1);