[minor] removed the default precision for the margin_rate_or_amount field (#10923)

diff --git a/erpnext/accounts/doctype/pricing_rule/pricing_rule.json b/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
index 8860b09..6fae8f7 100644
--- a/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
+++ b/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
@@ -1023,7 +1023,7 @@
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
-   "precision": "2", 
+   "precision": "", 
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
@@ -1284,7 +1284,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2017-08-31 16:34:41.614743", 
+ "modified": "2017-09-27 08:31:38.432574", 
  "modified_by": "Administrator", 
  "module": "Accounts", 
  "name": "Pricing Rule", 
diff --git a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
index 41b794c..613f384 100644
--- a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
+++ b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
@@ -699,7 +699,7 @@
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
-   "precision": "2", 
+   "precision": "", 
    "print_hide": 1, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
@@ -2166,7 +2166,7 @@
  "issingle": 0, 
  "istable": 1, 
  "max_attachments": 0, 
- "modified": "2017-07-17 17:54:48.246507", 
+ "modified": "2017-09-27 08:31:37.827893", 
  "modified_by": "Administrator", 
  "module": "Accounts", 
  "name": "Sales Invoice Item", 
diff --git a/erpnext/selling/doctype/quotation_item/quotation_item.json b/erpnext/selling/doctype/quotation_item/quotation_item.json
index 794494d..3fc56fa 100644
--- a/erpnext/selling/doctype/quotation_item/quotation_item.json
+++ b/erpnext/selling/doctype/quotation_item/quotation_item.json
@@ -684,7 +684,7 @@
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
-   "precision": "2", 
+   "precision": "", 
    "print_hide": 1, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
@@ -1583,7 +1583,7 @@
  "istable": 1, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2017-05-10 17:14:45.736424", 
+ "modified": "2017-09-27 08:31:37.485134", 
  "modified_by": "Administrator", 
  "module": "Selling", 
  "name": "Quotation Item", 
diff --git a/erpnext/selling/doctype/sales_order_item/sales_order_item.json b/erpnext/selling/doctype/sales_order_item/sales_order_item.json
index 47bc1b6..fd7b0f2 100644
--- a/erpnext/selling/doctype/sales_order_item/sales_order_item.json
+++ b/erpnext/selling/doctype/sales_order_item/sales_order_item.json
@@ -714,7 +714,7 @@
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
-   "precision": "2", 
+   "precision": "", 
    "print_hide": 1, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
@@ -745,7 +745,7 @@
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
-   "precision": "2", 
+   "precision": "", 
    "print_hide": 1, 
    "print_hide_if_no_value": 0, 
    "read_only": 1, 
@@ -1963,7 +1963,7 @@
  "istable": 1, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2017-07-28 14:04:04.289428", 
+ "modified": "2017-09-27 08:31:37.129537", 
  "modified_by": "Administrator", 
  "module": "Selling", 
  "name": "Sales Order Item", 
diff --git a/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json b/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
index a441a7f..4e1ea40 100644
--- a/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
+++ b/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
@@ -713,7 +713,7 @@
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
-   "precision": "2", 
+   "precision": "", 
    "print_hide": 1, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
@@ -1956,7 +1956,7 @@
  "issingle": 0, 
  "istable": 1, 
  "max_attachments": 0, 
- "modified": "2017-05-10 17:14:50.456930", 
+ "modified": "2017-09-27 08:31:38.768846", 
  "modified_by": "Administrator", 
  "module": "Stock", 
  "name": "Delivery Note Item",