Remove target flag from code model test

Author: kubo39

src/test/codegen/codemodels.rs

@@ -1,8 +1,8 @@
 // revisions: NOMODEL MODEL-SMALL MODEL-KERNEL MODEL-MEDIUM MODEL-LARGE
 //[NOMODEL] compile-flags:
 //[MODEL-SMALL] compile-flags: -C code-model=small
-//[MODEL-KERNEL] compile-flags: --target=x86_64-unknown-linux-gnu -C code-model=kernel
-//[MODEL-MEDIUM] compile-flags: --target=x86_64-unknown-linux-gnu -C code-model=medium
+//[MODEL-KERNEL] compile-flags: -C code-model=kernel
+//[MODEL-MEDIUM] compile-flags: -C code-model=medium
 //[MODEL-LARGE] compile-flags: -C code-model=large
 
 #![crate_type = "lib"]