Remove pretty tests for LLVM-style inline assembly

src/test/pretty/llvm-asm-clobbers.rs

@@ -1,3 +0,0 @@
-#![feature(llvm_asm)]
-
-pub fn main() { unsafe { llvm_asm!("" : : : "hello", "world") }; }

src/test/pretty/llvm-asm-options.rs

@@ -1,11 +0,0 @@
-#![feature(llvm_asm)]
-
-// pp-exact
-
-pub fn main() {
-    unsafe {
-        llvm_asm!("" : : : : "volatile");
-        llvm_asm!("" : : : : "alignstack");
-        llvm_asm!("" : : : : "intel");
-    }
-}

src/test/pretty/raw-str-nonexpr.rs

@@ -1,8 +1,8 @@
 // pp-exact
 
-#![feature(llvm_asm)]
-
 #[cfg(foo = r#"just parse this"#)]
 extern crate blah as blah;
 
-fn main() { unsafe { llvm_asm!(r###"blah"###); } }
+use std::arch::asm;
+
+fn main() { unsafe { asm!(r###"blah"###); } }