remove resolved TODO questions

Author: Anatol Ulrich

crates/ide/src/rename.rs

@@ -168,7 +168,6 @@ fn find_definitions(
     let v: RenameResult<Vec<(ast::NameLike, Definition)>> = symbols.collect();
     match v {
         // remove duplicates
-        // TODO is "unique by `Definition`" correct?
         Ok(v) => {
             if v.is_empty() {
                 Err(format_err!("No references found at position"))

crates/ide_db/src/source_change.rs

@@ -58,7 +58,7 @@ impl SourceChange {
     pub fn merge(mut self, other: SourceChange) -> SourceChange {
         self.extend(other.source_file_edits);
         self.extend(other.file_system_edits);
-        self.is_snippet |= other.is_snippet; // TODO correct?
+        self.is_snippet |= other.is_snippet;
         self
     }
 }