fix: cleanup for plugin submission (tasks 9-13)

- Remove unused vault.delete() method in favor of trashFile()
- Replace \x00-\x1F with \u0000-\u001F for clearer regex syntax
- Verify no unused imports, variables, or scoping issues

All cleanup tasks verified with tsc --noUnusedLocals --noUnusedParameters

src/adapters/interfaces.ts

@@ -34,8 +34,7 @@ export interface IVaultAdapter {
 	// File modification
 	modify(file: TFile, data: string): Promise<void>;
 
-	// File deletion
-	delete(file: TAbstractFile): Promise<void>;
+	// File deletion (respects Obsidian trash settings)
 	trash(file: TAbstractFile, system: boolean): Promise<void>;
 }
 

src/adapters/vault-adapter.ts

@@ -43,10 +43,6 @@ export class VaultAdapter implements IVaultAdapter {
 		await this.vault.modify(file, data);
 	}
 
-	async delete(file: TAbstractFile): Promise<void> {
-		await this.vault.delete(file);
-	}
-
 	async trash(file: TAbstractFile, system: boolean): Promise<void> {
 		await this.vault.trash(file, system);
 	}

src/utils/path-utils.ts

@@ -65,7 +65,8 @@ export class PathUtils {
 		}
 
 		// Check for invalid characters (Windows restrictions)
-		const invalidChars = /[<>:"|?*\x00-\x1F]/;
+		// Invalid chars: < > : " | ? * and ASCII control characters (0-31)
+		const invalidChars = /[<>:"|?*\u0000-\u001F]/;
 		if (invalidChars.test(normalized)) {
 			return false;
 		}