Fix 'unused borrow that must be used' warnings.

I don't remember seeing this warning before upgrading to Rust 1.55

Author: nickrolfe

autobuilder/src/main.rs

@@ -13,7 +13,7 @@ fn main() -> std::io::Result<()> {
     };
     let codeql: PathBuf = [&dist, codeql].iter().collect();
     let mut cmd = Command::new(codeql);
-    &cmd.arg("database")
+    cmd.arg("database")
         .arg("index-files")
         .arg("--include-extension=.rb")
         .arg("--include-extension=.erb")
@@ -27,9 +27,9 @@ fn main() -> std::io::Result<()> {
         .split("\n")
     {
         if line.starts_with("include:") {
-            &cmd.arg("--include").arg(&line[8..]);
+            cmd.arg("--include").arg(&line[8..]);
         } else if line.starts_with("exclude:") {
-            &cmd.arg("--exclude").arg(&line[8..]);
+            cmd.arg("--exclude").arg(&line[8..]);
         }
     }
     let exit = &cmd.spawn()?.wait()?;

extractor/src/extractor.rs

@@ -166,7 +166,7 @@ pub fn extract(
     parser.set_language(language).unwrap();
     parser.set_included_ranges(&ranges).unwrap();
     let tree = parser.parse(&source, None).expect("Failed to parse file");
-    &trap_writer.comment(format!("Auto-generated TRAP file for {}", path.display()));
+    trap_writer.comment(format!("Auto-generated TRAP file for {}", path.display()));
     let file_label = &trap_writer.populate_file(path);
     let mut visitor = Visitor {
         source: &source,