Address review remarks: ignore comments parser by coverage tool, remo…

…ve unnecessary Buffer reference in compile utils.

.nycrc.json

@@ -7,7 +7,8 @@
         "**/coverage/**",
         "**/docs/**",
         "**/.compiler_cache/**",
-        "src/compile/inference/file_level_definitions_parser*.ts"
+        "src/compile/inference/file_level_definitions_parser*.ts",
+        "src/ast/comments/comments_parser*.ts"
     ],
     "reporter": ["lcov", "text-summary"],
     "all": true,

src/compile/utils.ts

@@ -281,7 +281,7 @@ export async function compileSol(
     const remapping = pathOptions.remapping || [];
     const parsedRemapping = parsePathRemapping(remapping);
 
-    const files: FileMap = new Map<string, Buffer>();
+    const files: FileMap = new Map();
     const resolvedFileNames = new Map<string, string>();
     const visited = new Set<string>();