Remove test for unused error code

This error code is never emitted, and the contents of this test are
identical to that of `E0017.rs`.

2 files changed, 0 insertions, 37 deletions

diff --git a/src/test/ui/error-codes/E0388.rs b/src/test/ui/error-codes/E0388.rs
deleted file mode 100644
index 3aa4ac9655c..00000000000
--- a/src/test/ui/error-codes/E0388.rs
+++ /dev/null
@@ -1,9 +0,0 @@
-static X: i32 = 1;
-const C: i32 = 2;
-
-const CR: &'static mut i32 = &mut C; //~ ERROR E0017
-static STATIC_REF: &'static mut i32 = &mut X; //~ ERROR E0017
-                                              //~| ERROR cannot borrow
-static CONST_REF: &'static mut i32 = &mut C; //~ ERROR E0017
-
-fn main() {}
diff --git a/src/test/ui/error-codes/E0388.stderr b/src/test/ui/error-codes/E0388.stderr
deleted file mode 100644
index b52d5260b13..00000000000
--- a/src/test/ui/error-codes/E0388.stderr
+++ /dev/null
@@ -1,28 +0,0 @@
-error[E0017]: references in constants may only refer to immutable values
-  --> $DIR/E0388.rs:4:30
-   |
-LL | const CR: &'static mut i32 = &mut C;
-   |                              ^^^^^^ constants require immutable values
-
-error[E0017]: references in statics may only refer to immutable values
-  --> $DIR/E0388.rs:5:39
-   |
-LL | static STATIC_REF: &'static mut i32 = &mut X;
-   |                                       ^^^^^^ statics require immutable values
-
-error[E0596]: cannot borrow immutable static item `X` as mutable
-  --> $DIR/E0388.rs:5:39
-   |
-LL | static STATIC_REF: &'static mut i32 = &mut X;
-   |                                       ^^^^^^ cannot borrow as mutable
-
-error[E0017]: references in statics may only refer to immutable values
-  --> $DIR/E0388.rs:7:38
-   |
-LL | static CONST_REF: &'static mut i32 = &mut C;
-   |                                      ^^^^^^ statics require immutable values
-
-error: aborting due to 4 previous errors
-
-Some errors have detailed explanations: E0017, E0596.
-For more information about an error, try `rustc --explain E0017`.