Merged PR 4502: Revert "Adds Onboarding MRR"

# Description

_Describe your motivation and changes here._

# Checklist

- [ ] The edited models and dependants run properly with production data.
- [ ] The edited models are sufficiently documented.
- [ ] The edited models contain PK tests, and I've ran and passed them.
- [ ] I have checked for DRY opportunities with other models and docs.
- [ ] I've picked the right materialization for the affected models.

# Other

- [ ] Check if a full-refresh is required after this PR is merged.

Revert "Adds Onboarding MRR"

Reverted commit `dab210c6`.

models/intermediate/cross/schema.yml

@@ -1989,11 +1989,6 @@ models:
         description: |
           Total revenue churn rate for the current month MTD.
 
-      - name: current_month_mtd_onboarding_mrr
-        data_type: numeric
-        description: |
-          Total expected Onboarding MRR for the current month MTD.
-
       - name: previous_year_mtd_billable_bookings
         data_type: integer
         description: |
@@ -2104,12 +2099,6 @@ models:
           Total revenue churn rate for the previous year 
           (12 months ago) MTD.
 
-      - name: previous_year_mtd_onboarding_mrr
-        data_type: numeric
-        description: |
-          Total expected Onboarding MRR for the previous year 
-          (12 months ago) MTD.
-
       - name: current_ytd_billable_bookings
         data_type: integer
         description: |
@@ -2218,11 +2207,6 @@ models:
         description: |
           Total revenue churn rate for the current financial year YTD.
 
-      - name: current_ytd_onboarding_mrr
-        data_type: numeric
-        description: |
-          Total expected Onboarding MRR for the current financial year YTD.
-
       - name: previous_ytd_billable_bookings
         data_type: integer
         description: |
@@ -2332,12 +2316,6 @@ models:
           Total revenue churn rate for the previous 
           financial year YTD.
 
-      - name: previous_ytd_onboarding_mrr
-        data_type: numeric
-        description: |
-          Total expected Onboarding MRR for the previous 
-          financial year YTD.
-
       - name: previous_month_eom_billable_bookings
         data_type: integer
         description: |
@@ -2443,7 +2421,7 @@ models:
 
       - name: previous_month_eom_total_revenue_global_12m
         data_type: numeric
-        description: |
+        description: | 
           Total revenue generated globally in the last 12 months 
           for the previous month, at the end of the month.
           This is only used to compute the churn rate.
@@ -2454,12 +2432,6 @@ models:
           Total revenue churn rate for the previous month, 
           at the end of the month.
 
-      - name: previous_month_eom_onboarding_mrr
-        data_type: numeric
-        description: |
-          Total expected Onboarding MRR for the previous month, 
-          at the end of the month.
-
   - name: int_ytd_mtd_aggregated_main_metrics_overview
     description: |
       This model provides a high-level overview of the main metrics for the month-to-date