remove crashlytics reference

Author: mtopo27

docs/platforms/apple/guides/ios/size-analysis/insights.mdx

@@ -281,10 +281,10 @@ This script strips comments and blank lines after the files are generated, so ke
 
 **How to fix**: Maintain a minimal allowlist so only required entry points stay exported.
 
-1. Create a text file in your project, for example `Config/ExportedSymbols.txt`.
-2. Add `_main` on its own line. Add `__mh_execute_header` if you use Crashlytics or other tooling that finds symbols dynamically with `dlsym`.
-3. If you rely on other dynamic lookups, list those symbols too.
-4. In Xcode, set **Build Settings → Linking → Exported Symbols File** to the new file’s path.
+1. Create a text file in your project, for example `Config/ExportedSymbols.txt`
+2. Add `_main` on its own line
+3. If you rely on other dynamic lookups, list those symbols too
+4. In Xcode, set **Build Settings → Linking → Exported Symbols File** to the new file’s path
 
 ![Example of Exported Symbols File](./images/exported-symbols.png)