Revert "Feature/safe divide (#697)" (#702)

This reverts commit f368cec.

Author: deanna-minnick

README.md

@@ -45,7 +45,6 @@ Check [dbt Hub](https://hub.getdbt.com/dbt-labs/dbt_utils/latest/) for the lates
   - [generate_series](#generate_series-source)
   - [surrogate_key](#surrogate_key-source)
   - [safe_add](#safe_add-source)
-  - [safe_divide](#safe_divide-source)
   - [pivot](#pivot-source)
   - [unpivot](#unpivot-source)
   - [width_bucket](#width_bucket-source)
@@ -1025,21 +1024,6 @@ Implements a cross-database way to sum nullable fields using the fields specifie
 {{ dbt_utils.safe_add('field_a', 'field_b'[,...]) }}
 ```
 
-#### safe_divide ([source](macros/cross_db_utils/safe_divide.sql))
-
-This macro performs division but returns null if the denominator is 0. 
-
-**Args:**
-
-- `numerator` (required): The number you want to divide.
-- `denominator` (required): The number you want to divide by.
-
-**Usage:**
-
-```
-{{ dbt_utils.safe_divide('numerator', 'denominator') }}
-```
-
 #### pivot ([source](macros/sql/pivot.sql))
 
 This macro pivots values from rows to columns.

integration_tests/data/sql/data_safe_divide.csv

@@ -91,12 +91,6 @@ models:
           actual: actual
           expected: expected
 
-  - name: test_safe_divide
-    tests:
-      - assert_equal:
-          actual: actual
-          expected: expected
-
   - name: test_pivot
     tests:
       - dbt_utils.equality: