Remove code which was comparing Uri's incorrectly

Author: DustinCampbell

src/features/diagnosticsProvider.ts

@@ -245,13 +245,6 @@ class DiagnosticsProvider extends AbstractSupport {
                     }
                 }
 
-                // Clear diagnostics for files that no longer have any diagnostics.
-                this._diagnostics.forEach((uri, diagnostics) => {
-                    if (!entries.find(tuple => tuple[0] === uri)) {
-                        this._diagnostics.delete(uri);
-                    }
-                });
-
                 // replace all entries
                 this._diagnostics.set(entries);
             });