remove fastlane from cross platform docs

Author: mtopo27

docs/platforms/dart/guides/flutter/size-analysis/index.mdx

@@ -12,16 +12,12 @@ description: Upload Flutter builds to Sentry for size analysis.
 
 **Accepted Upload Formats**: XCArchive (preferred) | IPA
 
-**Upload Mechanisms**: [Sentry CLI](#uploading-ios-builds-with-the-sentry-cli) | [Fastlane](#uploading-ios-builds-with-fastlane)
+**Upload Mechanisms**: [Sentry CLI](#uploading-ios-builds-with-the-sentry-cli)
 
 ### Uploading iOS Builds With the Sentry CLI
 
 <Include name="size-analysis/upload-cli-ios" />
 
-### Uploading iOS Builds With Fastlane
-
-<Include name="size-analysis/upload-fastlane" />
-
 ## Getting Started - Android
 
 **Accepted Upload Formats**: AAB (preferred) | APK

docs/platforms/react-native/size-analysis/index.mdx

@@ -13,16 +13,12 @@ description: Upload React Native iOS and Android builds to Sentry for size analy
 
 **Accepted Upload Formats**: XCArchive (preferred) | IPA
 
-**Upload Mechanisms**: [Sentry CLI](#uploading-ios-builds-with-the-sentry-cli) | [Fastlane](#uploading-ios-builds-with-fastlane)
+**Upload Mechanisms**: [Sentry CLI](#uploading-ios-builds-with-the-sentry-cli)
 
 ### Uploading iOS Builds With the Sentry CLI
 
 <Include name="size-analysis/upload-cli-ios" />
 
-### Uploading iOS Builds With Fastlane
-
-<Include name="size-analysis/upload-fastlane" />
-
 ## Getting Started - Android
 
 **Accepted Upload Formats**: AAB (preferred) | APK