Remove uses of no-system-llvm

It looks like none of these are actually needed.

tests/codegen/alloc-optimisation.rs

@@ -1,5 +1,3 @@
-//
-// no-system-llvm
 // compile-flags: -O
 #![crate_type = "lib"]
 

tests/codegen/array-map.rs

@@ -1,5 +1,4 @@
 // compile-flags: -C opt-level=3 -C target-cpu=x86-64-v3
-// no-system-llvm
 // only-x86_64
 // ignore-debug (the extra assertions get in the way)
 

tests/codegen/dealloc-no-unwind.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -O
 
 #![crate_type="lib"]

tests/codegen/fewer-names.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -Coverflow-checks=no -O
 // revisions: YES NO
 // [YES]compile-flags: -Zfewer-names=yes

tests/codegen/integer-overflow.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -O -C overflow-checks=on
 
 #![crate_type = "lib"]

tests/codegen/issues/issue-116878.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -O
 // ignore-debug: the debug assertions get in the way
 #![crate_type = "lib"]

tests/codegen/issues/issue-44056-macos-tls-align.rs

@@ -1,6 +1,5 @@
 //
 // only-macos
-// no-system-llvm
 // compile-flags: -O
 
 #![crate_type = "rlib"]

tests/codegen/issues/issue-69101-bounds-check.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -O
 // ignore-debug: the debug assertions get in the way
 #![crate_type = "lib"]

tests/codegen/match-optimizes-away.rs

@@ -1,5 +1,4 @@
 //
-// no-system-llvm
 // compile-flags: -O
 #![crate_type="lib"]
 

tests/codegen/ptr-read-metadata.rs

@@ -1,5 +1,4 @@
 // compile-flags: -O -Z merge-functions=disabled
-// no-system-llvm
 // ignore-debug (the extra assertions get in the way)
 
 #![crate_type = "lib"]

tests/codegen/slice-as_chunks.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -O
 // only-64bit (because the LLVM type of i64 for usize shows up)
 // ignore-debug: the debug assertions get in the way

tests/codegen/slice-iter-len-eq-zero.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -O
 // ignore-debug: the debug assertions add extra comparisons
 #![crate_type = "lib"]

tests/codegen/slice-iter-nonnull.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -O
 // ignore-debug (these add extra checks that make it hard to verify)
 #![crate_type = "lib"]

tests/codegen/slice-position-bounds-check.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -O -C panic=abort
 #![crate_type = "lib"]
 

tests/codegen/vec-iter-collect-len.rs

@@ -1,5 +1,4 @@
 // ignore-debug: the debug assertions get in the way
-// no-system-llvm
 // compile-flags: -O
 #![crate_type="lib"]
 

tests/codegen/vec-optimizes-away.rs

@@ -1,5 +1,4 @@
 // ignore-debug: the debug assertions get in the way
-// no-system-llvm
 // compile-flags: -O
 #![crate_type = "lib"]
 

tests/rustdoc/doc-cfg-target-feature.rs

@@ -1,7 +1,6 @@
 // only-x86_64
 // compile-flags:--test
 // should-fail
-// no-system-llvm
 
 // #49723: rustdoc didn't add target features when extracting or running doctests
 

tests/ui/for-loop-while/issue-69841.rs

@@ -2,7 +2,6 @@
 // LLVM bug which needed a fix to be backported.
 
 // run-pass
-// no-system-llvm
 
 fn main() {
     let buffer = [49u8, 10];

tests/ui/issue-76387-llvm-miscompile.rs

@@ -1,4 +1,3 @@
-// no-system-llvm
 // compile-flags: -C opt-level=3
 // aux-build: issue-76387.rs
 // run-pass