Remove unused code in machinst

cranelift/codegen/src/lib.rs

@@ -77,7 +77,6 @@ pub mod flowgraph;
 pub mod ir;
 pub mod isa;
 pub mod loop_analysis;
-pub mod machinst;
 pub mod print_errors;
 pub mod settings;
 pub mod timing;
@@ -85,6 +84,7 @@ pub mod verifier;
 pub mod write;
 
 pub use crate::entity::packed_option;
+pub use crate::machinst::buffer::MachSrcLoc;
 
 mod abi;
 mod bitset;
@@ -98,6 +98,7 @@ mod iterators;
 mod legalizer;
 mod licm;
 mod log;
+mod machinst;
 mod nan_canonicalization;
 mod partition_slice;
 mod postopt;