Remove unused contextPercentage variable (#5312)

Author: daniel-lxs

src/core/environment/getEnvironmentDetails.ts

@@ -200,9 +200,6 @@ export async function getEnvironmentDetails(cline: Task, includeFileDetails: boo
 	const { id: modelId, info: modelInfo } = cline.api.getModel()
 	const contextWindow = modelInfo.contextWindow
 
-	const contextPercentage =
-		contextTokens && contextWindow ? Math.round((contextTokens / contextWindow) * 100) : undefined
-
 	details += `\n\n# Current Cost\n${totalCost !== null ? `$${totalCost.toFixed(2)}` : "(Not available)"}`
 
 	// Add current mode and any mode-specific warnings.