Removing (what I think is) a superfluous filename check

Author: davidalber

tests/system.rs

@@ -611,22 +611,18 @@ fn check_blocks_idempotency(blocks: &Vec<CodeBlock>) {
             )));
             failures += 1;
         } else {
-            for &(ref file_name, ref text) in &file_map {
-                if let FileName::Custom(ref file_name) = *file_name {
-                    if file_name == "stdin" {
-                        let compare = make_diff(&block.code_block, text, DIFF_CONTEXT_SIZE);
-                        if !compare.is_empty() {
-                            let mut mismatches = HashMap::new();
-                            mismatches.insert(PathBuf::from("Configurations.md"), compare);
-                            print_mismatches(mismatches, |line_num| {
-                                format!(
-                                    "\nMismatch at Configurations.md:{}:",
-                                    line_num + block.code_block_start_line - 1
-                                )
-                            });
-                            failures += 1;
-                        }
-                    }
+            for &(ref _file_name, ref text) in &file_map {
+                let compare = make_diff(&block.code_block, text, DIFF_CONTEXT_SIZE);
+                if !compare.is_empty() {
+                    let mut mismatches = HashMap::new();
+                    mismatches.insert(PathBuf::from("Configurations.md"), compare);
+                    print_mismatches(mismatches, |line_num| {
+                        format!(
+                            "\nMismatch at Configurations.md:{}:",
+                            line_num + block.code_block_start_line - 1
+                        )
+                    });
+                    failures += 1;
                 }
             }
         }