chore: Remove unused context_length parameter

Author: JoshFerge

static/app/components/events/autofix/autofixRootCause.tsx

@@ -300,7 +300,6 @@ function AutofixRootCauseDisplay({
       group_id: groupId,
       run_id: runId,
       has_additional_context: !!instruction,
-      context_length: instruction ? instruction.length : undefined,
     });
 
     if (instruction) {

static/app/utils/analytics/issueAnalyticsEvents.tsx

@@ -81,7 +81,6 @@ export type IssueEventParameters = {
     group_id: string;
     has_additional_context: boolean;
     run_id: string;
-    context_length?: number;
   };
   'autofix.setup_modal_viewed': {
     groupId: string;