chore: revert ai prompt event changes

Author: gagik

packages/compass-aggregations/src/modules/pipeline-builder/pipeline-ai.ts

@@ -247,7 +247,6 @@ export const runAIPipelineGeneration = (
     track(
       'AI Prompt Submitted',
       () => ({
-        source: 'natural language query' as const,
         editor_view_type,
         user_input_length: userInput.length,
         request_id: requestId,

packages/compass-query-bar/src/stores/ai-query-reducer.ts

@@ -178,7 +178,6 @@ export const runAIQuery = (
     track(
       'AI Prompt Submitted',
       () => ({
-        source: 'natural language query' as const,
         editor_view_type: 'find' as const,
         user_input_length: userInput.length,
         has_sample_documents: provideSampleDocuments,