Remove the #[pin_v2] test since it produces different errors on different archs

tests/ui/pin-ergonomics/pin_v2-attr.rs

@@ -135,24 +135,4 @@ macro_rules! macro_def {
 #[pin_v2] //~ ERROR `#[pin_v2]` attribute cannot be used on macro calls
 macro_def!();
 
-// Restricted on architectures where inline assembly is stable
-// accroding to `compiler/rustc_ast_lowering/src/asm.rs`
-#[cfg(any(
-    target_arch = "x86",
-    target_arch = "x86_64",
-    target_arch = "arm",
-    target_arch = "aarch64",
-    target_arch = "arm64ec",
-    target_arch = "riscv32",
-    target_arch = "riscv64",
-    target_arch = "loongarch32",
-    target_arch = "loongarch64",
-    target_arch = "s390x",
-))]
-std::arch::global_asm! {
-    "{}",
-    #[pin_v2] //~ ERROR this attribute is not supported on assembly
-    const 0
-}
-
 fn main() {}

tests/ui/pin-ergonomics/pin_v2-attr.stderr

@@ -6,12 +6,6 @@ LL | #[pin_v2]
    |
    = help: `#[pin_v2]` can be applied to data types and unions
 
-error: this attribute is not supported on assembly
-  --> $DIR/pin_v2-attr.rs:154:5
-   |
-LL |     #[pin_v2]
-   |     ^^^^^^^^^
-
 error: allow, cfg, cfg_attr, deny, expect, forbid, and warn are the only allowed built-in attributes in function parameters
   --> $DIR/pin_v2-attr.rs:84:12
    |
@@ -314,5 +308,5 @@ LL | #[pin_v2]
    |
    = help: `#[pin_v2]` can be applied to data types and unions
 
-error: aborting due to 40 previous errors
+error: aborting due to 39 previous errors