fix: remove duplicate getErrorMessage import in discovery.ts

Squash merge left a duplicate import line causing TS2300 and oxc parse
errors in CI. Also clean up stale blank lines in discovery.ts and
execution.ts.

src/discovery.ts

@@ -46,8 +46,6 @@ interface YamlCliDefinition {
   navigateBefore?: boolean | string;
 }
 
-
-
 function parseStrategy(rawStrategy: string | undefined, fallback: Strategy = Strategy.COOKIE): Strategy {
   if (!rawStrategy) return fallback;
   const key = rawStrategy.toUpperCase() as keyof typeof Strategy;

src/execution.ts

@@ -22,7 +22,6 @@ const _loadedModules = new Set<string>();
 type CommandArgs = Record<string, unknown>;
 
 
-
 /**
  * Validates and coerces arguments based on the command's Arg definitions.
  */