Remove dangling COPYRIGHT references

Missed in 2a663555dd.

src/test/ui/issues/issue-49851/compiler-builtins-error.rs

@@ -1,6 +1,4 @@
 //~ ERROR 1:1: 1:1: can't find crate for `core` [E0463]
-// http://rust-lang.org/COPYRIGHT.
-//
 
 // compile-flags: --target thumbv7em-none-eabihf
 #![deny(unsafe_code)]

src/test/ui/ui-testing-optout.rs

@@ -3,9 +3,6 @@
 // Line number < 10
 type A = B; //~ ERROR
 
-// http://rust-lang.org/COPYRIGHT.
-//
-
 // Line number >=10, <100
 type C = D; //~ ERROR
 

src/test/ui/ui-testing-optout.stderr

@@ -8,21 +8,21 @@ error[E0412]: cannot find type `B` in this scope
   | similarly named type alias `A` defined here
 
 error[E0412]: cannot find type `D` in this scope
-  --> $DIR/ui-testing-optout.rs:10:10
-   |
-4  | type A = B;
-   | ----------- similarly named type alias `A` defined here
+ --> $DIR/ui-testing-optout.rs:7:10
+  |
+4 | type A = B;
+  | ----------- similarly named type alias `A` defined here
 ...
-10 | type C = D;
-   |          ^ help: a type alias with a similar name exists: `A`
+7 | type C = D;
+  |          ^ help: a type alias with a similar name exists: `A`
 
 error[E0412]: cannot find type `F` in this scope
-  --> $DIR/ui-testing-optout.rs:95:10
+  --> $DIR/ui-testing-optout.rs:92:10
    |
 4  | type A = B;
    | ----------- similarly named type alias `A` defined here
 ...
-95 | type E = F;
+92 | type E = F;
    |          ^ help: a type alias with a similar name exists: `A`
 
 error: aborting due to 3 previous errors

src/test/ui/unsafe/unsafe-fn-assign-deref-ptr.rs

@@ -1,7 +1,3 @@
-// http://rust-lang.org/COPYRIGHT.
-//
-
-
 fn f(p: *mut u8) {
     *p = 0; //~ ERROR dereference of raw pointer is unsafe
     return;

src/test/ui/unsafe/unsafe-fn-assign-deref-ptr.stderr

@@ -1,5 +1,5 @@
 error[E0133]: dereference of raw pointer is unsafe and requires unsafe function or block
-  --> $DIR/unsafe-fn-assign-deref-ptr.rs:6:5
+  --> $DIR/unsafe-fn-assign-deref-ptr.rs:2:5
    |
 LL |     *p = 0;
    |     ^^^^^^ dereference of raw pointer